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Showing posts with label relativity. Show all posts
Showing posts with label relativity. Show all posts

Saturday, 30 March 2019

නූතනත්වයේ හරය


නූතනත්වයේ හරය



විසිවැනි සියවස ආරම්භයේ සිට ම වගේ බටහිර නූතනත්වයේ පරිවාර අදහස් කඩා වැටෙන්න පටන් ගත්ත. පරිවාර අදහස් කීවාට ඒව වාටියෙ (පරිධියෙ) අදහස් නොවෙයි. ඒවත් වැදගත්. ඒත් හරය ම නො වෙයි. නිශ්චිතභාවය, හේතුවාදය, ඌනිතවාදය, නිරපේක්‍ෂතාව, වාස්තවිකත්වය, යථාර්ථය ආදී අදහස් ප්‍රශ්න කෙරෙන්න පටන් ගත්ත. එහෙත් එයටත් කලින් පශ්චාත්නූතන කියන වචන පාවිච්චි වුණා. විශේෂයෙන් ම චිත්‍රකලාවෙ නූතනත්වය පන්නපු චිත්‍ර ගැන කතා කෙරුණා. චිත්‍රකලාවෙන් පස්සෙ බටහිර විද්‍යාවෙ තමයි නූතනත්ව අදහස් ප්‍රශ්න කෙරුණෙ.

Wednesday, 9 May 2018

නියම, සුසමාදර්ශ හා චින්තනය


නියම, සුසමාදර්ශ හා චින්තනය



බටහිර විද්‍යාව පාසලේත් විශ්වවිද්‍යාලයේත් ඉගැන්වෙන්නේ න්‍යායික තර්කානුකූල නිමාවක් ඇති දැනුම් පද්ධතියක් ලෙස. නිව්ටන්ගේ නියම ගැන සිසුන් දන්නේ ඒ නිමාවූ පද්ධතිය ලෙස. නිව්ටන්ගේ ම ගුරුත්වාකර්ෂණය ඉගැන්වෙන්නේත් එහෙමයි. අනෙක් මාතෘකාත් ඒ විධියට ඉගැන්වෙන්නේ. සිසුන් හිතන්නේ බටහිර විද්‍යාවේ ප්‍රවාද සත්‍ය කියා. සිසුන්ට බටහිර විද්‍යාවේ ඉතිහාසයවත් මාතෘකා කිහිපයක් පමණක් අරගෙන උගන්වනවා නම් හොඳයි.

Wednesday, 15 February 2017

බටහිර කොට්ටෝරුවෝ


බටහිර කොට්ටෝරුවෝ


බටහිර භෞතික විද්‍යාඥයන් සාමාන්‍යයෙන් අනෙක් බටහිර විද්‍යාඥයන්ට වඩා පොදුවේ බටහිර දර්ශනය හා විශේෂයෙන් බටහිර විද්‍යාවේ දර්ශනය ගැන උනන්දුවක් දක්වනවා. ලංකාවේ නම් බටහිර දර්ශනය හා බටහිර විද්‍යාවේ දර්ශනය ගැන උනන්දුවක් දක්වන්නේ බටහිර භෞතික විද්‍යාඥයන් නොව බටහිර වෛද්‍යවරුන්. එහෙත් ඔවුන්ගෙන් ඒ කිසිම දෙයකට කිසිම දෙයක් අලුතෙන් එකතු වී නැහැ. ඔවුන් කරන්නේ අවුරුදු පනහකට පමණ පෙර බටහිර ලියු දේ ඊනියා සිංහල පාඨකයාට ඉදිරිපත් කිරීමයි. ඔවුන්ට අඩු තරමේ හැටේ දශකයේ තෝමස් කූන් කියා ඇති දේ ගැනවත් ප්‍රමාණවත් දැනුමක් නැහැ.

Sunday, 9 October 2011

Neutrinos and Arsenic

Do particles that travel faster than light exist? This is a question people have been asking since last Thursday when CERN laboratories in Switzerland announced that they had observed neutrinos travelling with velocities greater than of light. Even before this announcement some western Physicists had been speculating on particles travelling with velocities greater than of light and had even named them tachyons. However, these exotic particles would have had imaginary masses, whatever that means, and many Physicists were not willing to buy the idea. The claim by the CERN scientists was more down to earth. They had measured the time taken by neutrinos to travel a distance of 730 kilometres to a place in Italy and had found that the neutrinos covered that distance in 60 nanoseconds less than the time taken by photons or light radiation.

It would not be possible for Sri Lanka to undertake to carry out these experiments as our equipments are nowhere near what CERN have accumulated in the recent past. Thus even though the westerners claim that the experiments in western science should be able to be repeated by “anybody”, in practise there is only one other group, namely the Fermi Laboratories that can even think of repeating the experiments. There had been a third laboratory in Japan but unfortunately it has slowed down after the Japanese tsunami. Thus it comes down to only two laboratories including CERN in the whole world that can repeat the experiments. Then it is said the equipment in Fermi Laboratory are not sensitive as those in the CERN laboratories and thus the scientists will have to depend on measurements taken by one Laboratory exploding the myth of repeating an experiment by so called independent observers.

Neutrinos are supposed to be particles that come in three different flavours. The name flavour has been given to these particles to describe a certain abstract property of them and it is said that the neutrinos change their flavour while they travel to the earth from Sun where they are emitted from. There are different opinions about the mass of the neutrinos and some western Physicists are of the view that the mass is zero. Photons (light) also have zero mass and if the neutrinos are mass less then they should also travel with the velocity of light. The uncertainties on the mass of the neutrinos may be associated with the determination of their velocities and the Physicists world over are very cautious of the experiments carried out at CERN.

In any event though the results of the CERN experiments are in contradiction with special theory of relativity which is now more than hundred years old, and a pillar of western Physics, the western Physicists in the other laboratories nor of the same laboratory did not go round claiming that the equipments at CERN were not working or experiments had not been carried out at CERN or the Physicists who were involved with the neutrino experiments were publicity seeking unethical persons. All that they said was that the experiment had to be repeated especially at Fermi laboratories.

I mention this fact in order to compare with the behaviour of some of our “scientists” when we announced that Arsenic was present in pesticides and water in Rajarata areas. Of course the clue had been given to us by the Devivaru but we had tested various samples of pesticides and water from Rajarata for Arsenic in the laboratories of the University of Kelaniya using methods in western Chemistry. Our so called scientists went round saying that either we had not tested for Arsenic or that the relevant equipment at the University of Kelaniya were out of order or we had based ourselves only on the word of Devivaru. It is unfortunate that the persons responsible at that stage for all these propaganda against us were few of the so called Chemists attached to the University of Kelaniya.

They were never interested in repeating the experiments at other laboratories even after we gave our method at number of seminars and were only interested in slinging mud against the group that was involved with observations and experiments connected with the Rajarata Kidney Disease. It was with great difficulty after the Sri Lanka Customs and the Government of Sri Lanka exerted their influence that at least one laboratory decided to repeat the experiments. Strangely enough the results of their experiments have not been made public yet and no further action has been taken in this regard.

One of the criticisms made by the scientists in Sri Lanka who are nothing but glorified technicians involved with “cookery” was that we had not published our results in a so called peer reviewed journal and had announced them to the local press. The public was made to understand that publishing in so called peer reviewed journals was the only accepted practice in science and that we were only publicity seekers. As far as we were concerned we were interested in getting the government to do something about the pesticides containing Arsenic and were not after so called research papers in “prestigious” journals. Arsenic in water or pesticides is not a major “finding” in western Chemistry and the international press was not interested in our work. The government media and some others as well were hostile to our work and finally the issue has been forgotten though some of our associates are now involved with a movement to cultivate using traditional methods that were available in Sri Lanka before the English ruined our “govikama” and the economy.

Now when I heard the news of faster than light particles on Friday I was interested in finding out the prestigious journal that published this interesting result. However, the CERN group had announced their results to the press and not published in a peer reviewed journal. Their results may be true or not but the fact remains that the world including the western Physicists some of whom are not mere glorified technicians but who can produce new concepts, theories, experimental methods rather than involving themselves with “cookery” in the laboratories came to know of the results through media. They have not asked for peer reviewed papers and are only interested in repeating the experiment at CERN as well as at Fermi Laboratories.

Now coming back to the question of whether there are particles that travel with velocities greater than light all that can be said at this point is that normal thinking would suggest that if special theory of relativity is correct then there cannot be such particles. However, there are ways of accommodating such particles within special relativity and I am sure all that is needed is to make special relativity a relative theory rather than a theory applicable to all particles. In fact in Quantum Mechanics communication takes place between entangled particles with velocities greater than of light and if so there must be some mechanism either using “particles” or some other “substance” or even mere space time that makes it possible. All these questions have to be answered within the broader context of existence and these will be discussed under the series on so called scientific knowledge.

Copyright Prof. Nalin De Silva

Friday, 30 September 2011

On so called scientific knowledge IV

The apples and coconuts fall to the earth because of gravitation according to Newton. During Newton’s time the concept of force was associated with pulling and pushing. One could pull or push an object by using a force, which is applied through a rope or a pole or some such object, if not hands or other parts of the body are used directly. In other words a force, not a refined concept then, could be applied on an object only with another object that touched the first. However, unfortunately for Newton he could not show to the others the rope or the object that pulled the coconut or the apple to the earth. When some of his contemporaries wanted to see the rope Newton could only say it was action at a distance. Einstein had not formulated his special theory of relativity then and there was no upper limit on the speed with which “communication” between objects took place. Thus Newton was of the view that it was action at a distance instantly. The earth instantly exerted a force, the gravitational force, on the coconut that made the latter to come down once it was released.

The so called gravitational field was a later introduction following Maxwell who introduced the concept of field in connection with what is now known as electromagnetism. With the introduction of the gravitational field it was possible to describe how an object exerted the gravitational force on a distant second object without directly touching it. However it did not answer the questions that were later asked by Earnest Mach the Austrian Physicist cum Philosopher. Neither the gravitational force nor the gravitational field were not sensory perceptible and the question was whether gravitation existed as a “phenomenon”. In other words it became a problem in Ontology or theory of existence. Though Ontology and Epistemology are considered to belong to different branches in western Philosophy for Buddhists it is not so. It is knowledge of existence that we deal with and it is not possible to draw a line between epistemology and ontology.

How does one prove that “things” exist? One could say that sensory perceptible objects do exist while “objects” that are not sensory perceptible do not exist. Existence is used here in the conventional sense whatever it means. If one defines existence that way then not only Natha Deviyo but also the almighty God of Abrahamic religions does not exist. However, one could say an “object” that is sensory perceptible to at least a few human beings does exist, and if we believe the statements of some people that they have seen various gods then we could say that gods exist. However, others may say that the people who claim to have “seen” gods (gods experienced not necessarily with eyes) are affected by hallucination and they perceive “things” that do not exist. However this begs the question as we have already assumed that what these people perceive do not exist. The question is how we do know that those “objects” “phenomena” experienced by them do not exist? Let us leave the gods and come down to earth with or without gravitation to decide whether gravitation exists. Obviously not even Newton had felt gravitation at that time, and people such as the experimental Chemist whom was referred to in the previous instalment began to feel gravitation only after generations of students had been taught that coconuts are attracted to earth by the gravitational force.

Why did educated people before Einstein formulated his General Theory of Relativity and many such people even after, assume that gravitation existed? In other words how did they know that gravitation existed? It was not because they felt gravitation but simply because gravitation was able to explain why coconuts and apples fell to the ground. Now falling of coconuts was sensory perceptible unlike devivaru to almost all people and gravitation though sensory not perceptible explained a sensory perceptible phenomenon. It may be assumed that until a better definition is formulated, as far as non sensory perceptible “objects”, “phenomena” are concerned one way to show that they exist in the conventional sense is to show that some sensory perceptible phenomena are explained in terms of the relevant non sensory perceptible “objects” and “phenomena” in a consistent manner. Then of course the existence of non sensory perceptible “phenomena” “objects” is assumed if the animals are sensitive to those objects. However one could object to the latter by saying that even there the human beings explain the behaviour of animals on the assumption that such and such non sensory perceptible “objects” “phenomena” exist for the animals to behave in that particular manner. In other words there exist sensory perceptible objects and non sensory perceptible objects in the conventional sense, the sensory perceptible objects being those that could be “felt” with the five sense organs (in this section mind is deliberately omitted from been considered as the sixth sense organ though the Buddhists may object to it, as the western scientists and others of their ilk would not entertain a world grasped only with the mind) and of course with the mind (without mind nothing can be grasped), while the non sensory perceptible objects are those the humans assume to exist in order to explain sensory perceptible “objects” and “phenomena”.

We find dogs reacting in very strange ways when we do not feel anything extra ordinary. The dogs are used to “sense” the trail of a criminal and this “phenomenon” is explained by claiming that they (dogs not the criminals) are sensitive to smells that the humans usually cannot sense. There is no direct experience for the human beings of the smells or the sounds that the dogs are sensitive to, and we believe that those sounds and smells exist because that explains the behaviour of the dogs under certain circumstances. With the help of existing western Physics one could say that the dogs are sensitive to certain sound frequencies to which the humans are not sensitive. It is said that the some birds and fish are sensitive to magnetism or magnetic fields though the humans have no sense organ that would enable them to “feel” magnetism. Even though the human cannot feel magnetism through their sense organs they assume that magnetism and objects with magnetic properties exist that attract metals. People would have probably observed that certain objects had the ability to attract objects such as metals and if we go by the western thinking one person long long ago would have explained this phenomenon of attraction using the concept of magnetism. In Sinhala magnets are called “kantham” derived from kantha most probably of Sanskrit origin, meaning to attract as in the case of suriyakantha, the flower attracted to sun, and of course “kantha pakshaya” or women to whom men are attracted. No “scientist” in the ancient or modern world has explained this attraction using a non perceptible concept representing something that exists in women but the poets, not sparing Bhikkus such as Ven. Thotagamuwe Rahula Thera, have been busy from time immemorial describing the attractive features of the ladies. In a sense it is good that no “scientist” has been able to come out with a dry non sensory perceptible concept to describe this attractive feature for we would have lost all those beautiful poems on women by Rahula Hamuduruwan Vahansela and Sarachchandras not to mention the Bharath and other poets. How many poets other than a few postmodernist pundits who want to show off that they are third rate imitators, have written poems on magnets? Incidentally I use Bharath not to mean present India or an ancient India that did not exist before the British came to our part of the world. In my vocabulary Dambadiva means that land mass north of Sri Lanka or Helaya or Lanka, that existed before the Aryans migrated and Bharath means an area not necessarily coinciding with Dambadiva, after the Vedic culture was established by the Aryans mixing different cultures until the British conquered and founded India. (To be continued)

Copyright Prof. Nalin De Silva