Physics 2 Marks Questions

Some of the most profound statements on the nature of science have come from Albert Einstein, one of the greatest scientists of all time. What do you think did Einstein mean when he said: “The most incomprehensible thing about the world is that it is comprehensible”?

The shells of crabs found around a particular coastal location in Japan seem mostly to resemble the legendary face of a Samurai. Given below are two explanations of this observed fact. Which of these strikes you as a scientific explanation?

1. A tragic sea accident several centuries ago drowned a young Samurai. As a tribute to his bravery, nature through its inscrutable ways immortalised his face by imprinting it on the crab shells in that area.
2. After the sea tragedy, fishermen in that area, in a gesture of honour to their dead hero, let free any crab shell caught by them which accidentally had a shape resembling the face of a Samurai. Consequently, the particular shape of the crab shell survived longer and therefore in course of time the shape was genetically propagated. This is an example of evolution by artificial selection.

[Note: This interesting illustration taken from Carl Sagan’s ‘The Cosmos’ highlights the fact that often strange and inexplicable facts which on the first sight appear ‘supernatural’ actually turn out to have simple scientific explanations. Try to think out other examples of this kind].

Why do we call physics an exact science?

Some of the most profound statements on the nature of science have come from Albert Einstein, one of the greatest scientists of all time. What do you think did Einstein mean when he said: “The most incomprehensible thing about the world is that it is comprehensible”?

Is physics more of a philosophy or more of a mathematical science?

Name some technologies and related principles.

What do you mean by mass energy equivalence? Give example.

Name three conservation laws from nature.

Name the different types of forces and their range.

"The most incomprehensible thing about the world is that it is comprehensible". Who said this? What does this mean?

Give an example of achievement in unification.

Name the contribution made by the following physicists:

1. S. N. Bose.
2. J.C. Maxwell.
3. Paul Dirac.
4. Max Planck.

Give the salient features of Einstein's theory.

Why do we need quantum theory?

Give any five discoveries which has effected the society more.

In macroscopic level of Physics, gravitational force is dominant as compared to electromagnetic force, why?

Why do we need Quantum theory?

Name three important discoveries of physics, which have contributed a lot in development of biological sciences.

For a scientific theory to be acceptable “It should be verified by relevant observations or experiments and modified if need be” -Justify this statement with an example.

Mention some areas in which Physics has contributed to development.

Quantitative measurement plays major role in Physics, why?

Out of the four fundamental forces which one is:

1. Strongest.
2. Weakest?

Name at least three Indian scientists.

Name four fundamental forces in nature.

Every great physical theory starts as a heresy and ends as a dogma. Give examples for the validity of this remark.

The shells of crabs found around a particular coastal location in Japan seem mostly to resemble the legendary face of a Samurai. Given below are two explanations of this observed fact. Which of these strikes you as a scientific explanation?

1. A tragic sea accident several centuries ago drowned a young Samurai. As a tribute to his bravery, nature through its inscrutable ways immortalised his face by imprinting it on the crab shells in that area.
2. After the sea tragedy, fishermen in that area, in a gesture of honour to their dead hero, let free any crab shell caught by them which accidentally had a shape resembling the face of a Samurai. Consequently, the particular shape of the crab shell survived longer and therefore in course of time the shape was genetically propagated. This is an example of evolution by artificial selection.

[Note: This interesting illustration taken from Carl Sagan’s ‘The Cosmos’ highlights the fact that often strange and inexplicable facts which on the first sight appear ‘supernatural’ actually turn out to have simple scientific explanations. Try to think out other examples of this kind].

Name the phenomena/ fields with which microscopic domain of physics deals. Which theory explains these phenomena?

Out of the four fundamental forces, which force is weakest and which is strongest?