Author: kufit
Face to Face with the Universe
– Pushpa Raj Adhikary
Former Dean and Controller of Examinations
We human beings live in a planetary system of a star which we call the Sun. Our sun is just one of the minor stars in the cluster of about 250 billion stars called the Milky Way. We live far from the bright and densely populated nucleus of the Milky Way. Earth is one of the nine planets which surround the Sun, and continuously revolves around the Sun in more or less a fixed path known as its orbit. The earth is surrounded by a gaseous ocean. We live on the bottom of this rather opaque gaseous ocean. The earth is also one of the billions of other planets in the universe, nothing more than a tiny speck of dust in the vast galactic island. What can we hope to learn of this universe from our galactic backwoods?
In our short history of the existence on earth we had hardly had time enough to take stock of our immediate surroundings. We have just begun to know and understand ourselves. Thousands of years of human civilization are but a fleeting instance as compared with the periods of time in which matter evolves on the universal scale. Less than 500 years have passed since man first proved that this planet is a globe by circumnavigating it. A century has passed since we discovered, at first by speculative reasoning, some of the laws connecting space, time, and motion. We have just begun to probe the secrets of the structure of the matter. Our knowledge of the universe is scanty indeed and we still have a lot more to learn. But we are inquisitive, have learned things step by step and continue to learn many more things about our universe by the same way and in course of time will unravel more mysteries of the universe.
Apart from the terrestrial landscape of mountains, valleys, flat plain, dense forest and oceans, man has been looking up at the twinkling dots in the sky for thousands of years. Some have compared these twinkling dots, known as stars, the twinkling eyes of the universe looking down on earth. Stars appear after the Sunset and must have looked very mysterious objects for early human beings. Beginning with idle stargazing, it has now turned to systematic observations, first with naked eyes, then with the simplest of instruments, and today with the help of giant telescope with lenses several feet in diameter and other sophisticated instruments. Now we can distinguish planets and stars.
In addition, we have identified various other objects scattered around the vast void of the universe. There are very big clusters of stars like our Milky Way. These clusters of stars are known as galaxies. The galaxies have hundreds of solar systems like ours. There are huge objects made of a gaseous material known as nebulae. Some objects are not visible to us but we feel their presence by detecting the noises they emit. These noises are known as radio waves and are detected and analyzed to understand about these noisy objects. We can measure how big a star is, how far one star is from another, and measure the distance of the farthest nebulae. So the old saying “Twinkle, twinkle little star, how I wonder what you are” is no longer true. Today we can say “Twinkle, twinkle little star, we know exactly what you are”. Stars are no wonders today and neither are they little. Other stars are several thousands to even hundreds of millions larger than our sun and are made of materials in plasma state.
The earth is surrounded by an ocean of colorless gases which we call air. Air mainly contains nitrogen and oxygen along with different other gases in traces. This air covering of our planet earth is known as the atmosphere and is spread up to 3,000 kilometers altitude above the earth. Clouds are usually observed at an altitude of about 80 kilometres. Somewhat higher, between 100 and 120 kilometres, meteors appear as shooting stars. A flying meteor is a complex phenomenon involving the interaction of a fast moving body carrying an electrical charge with the Surrounding air. Atmosphere gradually becomes less and less dense depending on the distance from the surface of the earth. Some strange lights (Northern and Southern lights) called Aurora Polaris occur in the uppermost layers of the atmosphere as high as 1,200 kilometres.
At an altitude of 3,000 kilometres above the surface of the earth, just outside the edge of the atmosphere, electrically charged particles from the outer space counter us. Earth is a huge magnet and its magnetic influence spreads in the surrounding space known as magnetic field. The charge particles which come from outer space towards earth are trapped by the earth’s electromagnetic field. They spiral along the earth forming three radiation belts. A disturbance in this belt causes disturbances in our radio, television and other means of communication.
From the surface of the earth we see the sky is blue and the stars twinkle. These phenomena do occur due to the earth’s atmosphere. So, how does the sky look when we watch it beyond the atmosphere? Astronauts and space travelers tell us that the sky looks totally dark and stars no longer twinkle. Rather they look like dull light-emitting objects. If we recall back, on March 18, 1965 an earth man named Alexei Leonov, citizen of the then Soviet Socialist Republic, first encountered the vast void of the universe face to face. Leonov became the first person from the planet earth to push himself away from his spaceship Voskhod 2 to drift out into the bottomless void known as space. Leonov was connected with a rope-like chord to keep from losing himself in the strange, weird void surrounding him.
Man is inquisitive by nature. As soon as we discover a new law of nature, we try to exploit it for our own ends. Having discovered the secret of lightning bolts we use it to produce electric light. By learning the laws of river flow we dug irrigation canals. We have harnessed the power of nuclear fission of uranium and will soon learn to tame the thermonuclear reaction which heats the sun and stars. No sooner do we discover the laws of the universe than we surely put them to work and make them serve us. We have understood the terrestrial laws and phenomena and made them serve us. So we can hope that by becoming the master of the universe one day we may be able to reconstruct the planetary systems, move stars about and regulate their brightness at our will.
Disciplinary Bias, Interdisciplinary Benignity
So many people today — and even professional scientists — seem to me like somebody who has seen thousands of trees but has never seen a forest. – Albert Einstein
Men of the sociological tribe rarely visit the land of the physicists and have little idea what they do over there. If the sociologists were to step into the building occupied by the English department, they would encounter the cold stares if not the slingshots of the hostile natives … the disciplines exist as separate estates, with distinctive subcultures. (p. 23)
We all want to make our lives more meaningful tomorrow than they are today. This is our ideal. That ideal can be understood as truth for scientists and as an ideal place for geographers, as a good society for social scientists in general, and as a good life for the people in humanities. Because this ideal is to be achieved in the future, it is open-ended, and it requires the use of intuition and imagination. Again, I want to say that intuition and imagination know no disciplinary boundaries. (Shin, “Confessions”)
- Becher, T. (1989). Academic tribes and territories: Intellectual enquiry and the cultures of disciplines. Milton Keynes: Open University Press.
- Frank, R. (1988). ‘Interdisciplinarity’: The first half century. In E.G. Stanley and T.F. Hoad (Eds.), Words: For Robert Burchfield’s sixty-fifth birthday (pp. 91–101). Cambridge: D.S. Brewer.
- Lattuca, L. R. (2001). Creating interdisciplinarity. Nashville: Vanderbilt University Press.
- Moran, J. (2002). Interdisciplinarity. New York: Routledge.
- Nissani, Moti. Interdisciplinarity: What, where, why? Retrieved October 25, 2005 from http://www.is.wayne.edu/mnissani/2030/ispessay.htm .
- Shin, Un-chol. Confessions of an Interdisciplinarian. Retrieved October 25, 2005 from http://www.humanities.eku.edu/interdisciplinarian.htm .
Secret of Prosperity
– Ananda Kafle
Department of Natural Sciences (Chemistry)
The later decades of the 20th century are marked as the period of a rapid growth of technologies. Beside information and communication technologies, significant developments have been achieved in a multitude of areas including agriculture, power generation, alternative energies, industrial productivity, etc. For developed countries, scientific innovations and researches have for long, remained an inevitable tool for strengthening national economy. The foundations of the 21st century identity of India and China as rapidly growing world economies were laid with the governments’ acceptance of the importance of science and technology in development.
Realization of the value of science and technology by the Chinese regime following frequent blows from Europeans in the 19th century enabled the sector to regain its pace, that was lost four centuries before, when the monarchy withdrew its interest on the subject assuming it to be trivial. Until the 14th century, when the country had its well flourished scientific innovations, China used to make remarkable contribution in the Asian economy. Especially, the four Chinese inventions – papermaking, gun powder, printing and compass (known as the Four Great Inventions) are appreciated for the prominent role they played in the then China. With the efforts of modern Chinese reformists, the science and technology sector of China has been flourishing as an independent discipline.
The field of scientific research and development is increasingly gaining higher priorities in China. The average increase in the Gross Domestic Expenditure in Research and Development (GERD) since 2000 is by 22.8%. The highest fraction of the allotted budget now is being spent in experimental developments and attempts are being made to raise the investments in applied researches. Higher expenditures in researches and an enthusiastic involvement of the business enterprises in the sector are playing important role in increasing the GDP. The multilateral efforts have made China able to rely on its own technological innovations to some extent. The ongoing developments in indigenous technologies are manifested in the fields like agriculture, manufacture of electronics, production of synthetic goods etc. All things together, are establishing China as a leading economy.
The well flourished economy of the ancient Indian subcontinent was contributed by their innovations in the then relevant areas like shipping, mining, baking earthen artifacts etc. The prosperous Vedic community was enriched with discoveries on medication, astrology and mathematics. The technologies blooming here earlier had greatly increased the power of this community among human civilizations. Inability of the scientific community to keep the spirit of the novelty and discoveries eventually kicked the territory back from the technology scenario.
In the colonial period, the British emperors had brought along with them the power of science and intellect, which in combination with the tactful political strategies, they used to dominate and rule the Indian society. After independence India’s economic growth is greatly contributed by innovations in technologies, especially in automobile engineering, nuclear science and information technology.
Some powerful political leaders in Nepal take the abutting Indian states as development models for our own country. The economic growth in different Indian states including those lagged behind in mainstream development are a consequence of the increasing investments that the government has been making in the field of scientific research and technology development, coupled with improved governance. Even in the time of harsh economy it has been making a 1/5th increment in science budget every year. Indian agriculture is not limited in development of dams, irrigation facilities and proper supply of the farm essentials, rather, is getting increasingly assisted by most modern technologies. Besides, the industrial sector including automobiles, textiles, pharmaceuticals, software etc are vigorously growing. The nations that are in the race of becoming the prospective world powers have been using science and technology as the most efficient tool to accomplish their purposes.
While the two large neighbors are making a big hop in development and use of technologies, the situation of our own is the most disappointing. We are not simply lagging behind with regards to the scientific innovations, rather, have not even started walking. Our agriculture sector, which is claimed to make the highest contribution to the GDP, has still remained within debates of how to augment the farm yield from traditional methods. Instead of being grown through the application of modern technologies, many of the industries are getting closed. The possibilities of using native technologies in agriculture or industries are still like a far cry.
The scientific research sector has always remained staggered by the government’s indifference, corruption and uncertainty. The organizations like Nepal Academy of Science and Technology (NAST), Nepal Agricultural Research Council (NARC) etc. and the universities in the country, which are supposed to be the centers of research activities have almost become non- functional. Instead of carrying out their actual job, the officials are busy pleasing the political power centers for their own development. This sector has been polluted by the political and bureaucratic influences. Instead of the scientists, the bureaucrats are making themselves the real leaders. General complaints are that the largest fraction of the scanty amount of budget that is allocated for scientific researches is either embezzled or is spent for purposes like international visits of the officials. Most of the scientists, who are working on the grants from foreign agencies, spend their skills on planning how to manipulate expenditures so that a large amount of the grants goes to their own pockets.
If we are to move ahead in the race of development and increasing national prestige, all the rubbishes associated with the scientific communities must be removed and technological innovations promoted or else, we can’t be upgraded from the status of the mere consumers of foreign products and gadgets.
(The numerical data presented are based on the official information from the concerned governments and authorities.)
(Earlier published in Republica, 7 August 2013)
Dealing with the Thinking
– Hem Raj Kafle
In teaching spontaneity has a greater power than planned outpourings though planning is fundamental to traditional theories of teaching. Spontaneity brings out original thoughts. It corresponds with the need of the circumstances, and creates the most suitable statements to the mood of the audience. No doubt, planning is useful. But it depends. Is what we deliver a set of PowerPoint slides prepared ages ago, and printed, photocopied and handed to the dear pupils in each session for their exam-time convenience? Or is it a formal lesson plan designed for a specific class situation, which the teacher updates every session, and which helps augment students’ learning through self-study, reflection, internalization and reconstruction?
I usually do not work with readymade handouts; I only reflect on and take notes of what I might say in the class, to compel myself to deliver the best from the internalized knowledge. My initial classes are filled with guidelines, not necessarily in the form of setting rules for students. I say that certain rules, like giving regular classes, making students regular and conducting tests are my works, but my being a leader automatically draws students towards them. I say I would not repeatedly remind them of the rules because I consider the students mature enough to understand the right ways; they should know that by making them work I am adding to my own stock of responsibilities.
I think the best thing I tell them is that a human being is a thinking and feeling creature and therefore has to save herself from being a machine. Life is less formula than feelings though formulas help shape a section of our professional future. Our lives are also guided largely by the works of others, or say, the thoughts of others. This sets for us the requirement to be associated with people who think and create ideas. Teachers seek this association in other teachers, and also with students. Students have teachers and their class fellows to fulfill this need.
I do not forget to explain the rationale of prescribing the contents of the courses. Every theme has a purpose, way beyond a compulsion to study and take exams. My first lecture explains why we teach a story in place of the other, how one text relates with the other and with the lives of the readers as well. Moreover, I make it a point to show what one gets to learn from certain writers and texts. I work in full adherence to V.S. Ramachandran’s warnings: “Did you enjoy doing what you did?” and “Did it really make an impact?” To me joy is what I feel from being able to make students realize the value of learning. And the impact need not always be outward, directed to changing our surroundings. It is equally important to experience some kind of transformation in ourselves. Any academic, creative task we do in a university should have the quality of giving direction to at least a few people including ourselves.
My classes teach me to teach better. I like to treat every new student as a mysterious stock of knowledge, sentiments and challenges. If you take her as a mere creature, you will not see her beyond a semester. If you take her as a thinking and feeling being, stop for a while to meditate on the potentials she bears. This is why I love to share the fancy of being old and mature and useful so that the students might fancy identifying with this vision of being old and mature and useful. This is called making people think beyond rules and formulas. My contribution in this sense lies in instilling, and sometimes reviving, this humane sense out of the monotony and rush for driving towards dreams and fulfillments.
This is why the readymade slides and handouts work only little with me. I do not either regret for not having any of them because I do not identify my success as a teacher with the sight of students breathlessly cramming slides and handouts few minutes before the examination bell. My satisfaction rather lies in those contented faces, which head smugly in and out of classrooms and exam halls on all seasons. I have all reasons to be happy for this notoriety of discouraging mechanical learning.
When Reetu Returns
Editorial
KUFIT sustains the commitment to continue though our appearance of late has been intermittent. This is one of the several good things we do and aspire to do in the University. So, our delay is reasonable.We promise not to fail. And we will keep on asking you to contribute by writing, by reading and by letting your own circle of friends know that we have this small platform.
We heartily thank our regular contributors. They have kept their promises despite having the same extent of engagement as we. They have helped us keep the zeal for keeping the forum alive. They have helped make it more professional and interdisciplinary by providing us diversity of themes and subjects.
We present KUFIT in a new template and platform. The previous site reportedly failed to open in certain places, and that some antiviruses blocked it. We hope the present site is more accessible. We hope it serves the purpose of intellectual engagements.
We expect your feedback.
In this issue:
1. The Omnipresent Force by Pushpa Raj Adhikary
2. सोमरस भनेको मदिरा नै हो त? by Mukunda Upadhyaya
3. Open and Distance Learning in Nepal... by Khagendra Acharya
4. अन्तरिक्ष-विज्ञान सम्बन्धमा केही चर्चा by Nirmala Mani Adhikary
5. Breathtaking Beijing by Kashiraj Pandey
6. On Identity by Hem Raj Kafle
The Omnipresent Force
– Pushpa Raj Adhikary
We call the pull of the earth on the bodies the force of gravity. The measure of this pull is called the weight of the body. There is no escape from the gravity and its eternal laws are valid even in the remotest parts of the universe. It equally pervades vacuum and the densest substance. There is no way of shielding from it or acting on it. Its action is less and less when we move away from earth but does not vanish completely. Gravity makes rivers flow down to the sea, keeps the atmosphere around the earth, and is the cause of tides in the oceans. We have to use force to overcome gravity if we want to move away from the earth.
Since time immemorial, living beings had to reckon with gravity, and learned to adapt to it. The force of gravity, which makes everything move towards it, was unexplained for ages. The first man to develop a scientific theory of gravity and apply it to study of the universe was the great Englishman, Sir Isaac Newton.
The anecdote that Newton discovered the law of gravity by watching an apple fall from a tree may or may not be true. It has been said that he invented this story to get rid of people demanding explanation of just how he discovered the great law. Today, any high school student knows this law with such an ease that it seems strange indeed that there was a time when learned men had not the slightest idea about it. However, it is not as it may appear to us and it took the genius of Newton to discover it.
Newton’s studies convinced him that not only earth attracts an apple but an apple also attracts the earth. In fact, every material body attracts other material bodies towards it. But then why the apple moves towards the earth but not the earth towards the apple? This attraction or pull or force exists between the earth and all heavenly bodies too. This is known as the force of gravitation.Any material object attracts all other material objects and this attraction is in proportion to the weight of an object. The heavier a body, the stronger is the attraction. The weight of the earth is enormous compared to the weight of an apple or a man. Hence, the attraction exerted by the earth on other objects is also very strong compared to the attraction of an apple on earth or by a man on earth. This attraction of the earth makes every body move towards earth. The attraction between two material bodies increases if they come closer or if their weights are increased.
About seventy years before Newton’s time, the great German Scientist Johannes Kepler discovered the law as how planets moved around the sun. But in Kepler’s time nobody knew why the planets moved as explained by him. Newton, with the help of the law of universal gravitation, could explain why the planets moved around the sun as explained by Kepler. The universal law of gravitation found another brilliant confirmation in the discovery of the planet Neptune. Astronomers had long discovered that the planet Uranus occasionally appeared to stray from its orbit. Sometimes it would slow down its motion and again it would go faster as if drawn by some invisible force. The law of gravitation predicted that the anomaly in the motion of Uranus was due to the presence of another planet farther from Uranus and soon astronomers discovered a new planet Neptune.
For many decades Newton’s theory of Gravitation appeared perfect. But then facts began to accumulate which could not be explained by the law of universal gravitation alone. One of these is the Seeliger paradox. This paradox goes this way. The universe is infinite and is infinitely variable. Its lifetime too, is unlimited. It is more or less filled with material bodies and so can be assumed to possess some mean density of matter. Seelinger decided to apply the universal law of gravitation to determine the gravitational force which an infinite universe would exert at any point within it. This force was found proportional to the radius of the universe. As the radius of the universe is infinite, so the force would be. But this is not the case. Does it mean that the law of Universal gravitation is not valid on universal scale?
Another phenomenon in which the conclusions of gravitational theory did not quite agree with observations was found in the displacement of the orbit if the planet Mercury. Very accurate calculations of the orbit of Mercury reveal that the point closer to the sun suffers a precession or displacement. For a long time this precession of the orbits of Mercury remained unexplained. It took a revolution in science to explain it, and the revolution was carried out by a young German Scientist, Albert Einstein.
It is a long known fact that if a gun fires at a distance we see the flash of light some time before we hear the sound. This tells us that sound travels in a far less speed that the light. It was possible to measure the speed of sound in the surface of the earth as 330 meters per second. But it is much harder to measure the speed of light because light travels with an incredible speed of 3,00000 kilometers per second. A ray of light can circle the earth in just over 0.1 second i.e. one tenth of a second. For a long time people were unable to measure the speed of light. It was finally measured by observing the eclipses of the satellites of the planet Jupiter from two points on earth’s orbit around the sun, when the earth was closed and farther from Jupiter. Today it is measured in laboratory conditions to a high degree of precession by means of rotating mirrors. In fact, not only light but all electromagnetic waves travel with light’s speed as the electromagnetic field moves through space.
But how do electromagnetic fields propagate through space? Does gravitational force also propagate through space in the form of gravitational field? If so, how fast does a gravitational field travel? As fast as sound in air, light in vacuum or with some other speed? Can the attraction between the bodies happen directly without the participation of the intervening medium? Do the gravitational force and gravitational field also propagate with the same speed of light or have a finite velocity? A new scientific theory was needed to explain the propagation of electromagnetic field through space and its foundation was laid in 1905-1915 by Albert Einstein in his special and general theories of relativity based on the geometries of Lobachevski and Riemann.
One of the fundamental conclusions of the special theory of relativity, which defines the interconnection between space and time, is the equivalence of mass and energy. The theory states that a moving body carries kinetic energy, hence its mass is greater than when it is at rest. The greater a body’s latent energy is, the greater is its mass. A cup of hot coffee is heavier than cold coffee in the same cup. The famous equation E=mc2 is Einstein’s formula of mass-energy equivalence.
But what is meant by a body’s mass? The mechanical concept of mass states that mass is a measure of a body’s inertia. Hence, mass can be expressed in terms of force and the acceleration which it imparts to the body. In physics, mass measured in this way is known as inertial mass. But mass can also be measured from Newton’s formula of gravitation. This mass of bodies which may be at rest relative to one another is known as gravitational mass. The physical interpretation of inertial and gravitational mass are different but quantitatively have, to date, been found to be the same no matter how they are measured. This led Einstein to think that inertia and gravitation must have a common origin. So, if a body’s inertial mass varies with the velocity of motion, then, he reasoned, the gravitational mass should also vary with the velocity of motion.
Einstein’s identification of inertia and gravity on the basis of the equality of inertial and gravitational mass of great significance. It enabled him, in 1915, to develop the general theory of relativity, which is the modern theory of gravitation. This modern theory offers a much more exact and profound explanation of the properties of the bodies than Newton’s theory. Einstein’s theory was a revolution in physics which provided explanation for many hitherto unexplained phenomena. But it would hardly be useful to present the theory in common language as it contains largely mathematical, extremely complicated equations belonging to the class of non-linear differential equations in spite of the clarity of its physical meaning.