What kind of questions can be asked from class 11 chapter 1 physical world ?
Answers
class 11 physics chapter 1 physical world NCERT Solutions
Q 1. Albert Einstein proposed some of the most important statements on the way science works. What was Einstein trying to say when he stated, “The most incomprehensible thing about the world is that it is comprehensible”?
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The complete physical world is naturally complex. The biological world has its own complexities. Moreover, different orders of magnitudes are involved in space, time and mass. In spite of all this, almost all the physical phenomena can be expressed in terms of a few basic laws. By this view in this context, Einstein’s statement becomes very clear.
Q 2. “Every great physical theory starts as hearsay and ends as a dogma”. Mention a few instances from the history of science regarding the credibility of this remark.
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A common observation in our daily life is that light travels in a straight line. When Huygens propounded his wave theory, it was a heresy. However, soon it became dogma as interference patterns, refraction etc. could be successfully explained on the basis of wave theory.
It was believed that light was only energy but when the photoelectric effect was discovered it was proposed that light had a particle nature too, this was greatly debated and treated as hearsay. However, Einstein finally proved it with his quantum theory of light. Henceforth, it has been treated as a dogma.
Q 3. “Politics is the art of the possible”. Similarly, “Science is the art of the soluble”. Justify this aphorism on the practice and nature of science.
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Politicians make anything and everything possible to win votes. And science is a systematized study of observation. Scientist and researchers study these observations and then work out certain laws from them. There is a multitude of natural phenomena taking place in this universe and all of them can be explained in terms of some basic laws. For e.g. F = mg is true for you and me and also for a star. Thus, in science we see that various phenomena are related, they are soluble and can be explained with similar or the same law. This goes on to justify that science is the art of the soluble just as politics is the art of the possible.
Q 4. India is now a key player in the field of technology and science, which is rapidly expanding, however, it still has not realized its true potential and is not a world leader in science. State some important factors, which according to you has obstructed the growth of science in India.
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Here are some important factors that have obstructed the growth of science in India:
Lack of infrastructure and funds for quality research work in science.• Poor pay scales and other facilities to scientists as compared to administrators.
Science education is neither properly oriented nor directed. It needs specific directions depending on our requirements.• The industrialists are the actual consumers of new technology and research. The industrialists of this country have little confidence in the ability of Indian scientists. There is practically no co-ordination between the researchers and the industrialists.
The rural-based science education is nearly non-existent so that majority of the population is deprived of the benefits of advancements in technology and science.
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