Question

Asked Nov 6, 2019

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The principle of relativity was recognised as both a mechanical and optical effect. Einstein believed that the principle should hold for both situations. One of his thought experimentds involves him sitting on a train travelling at the speed of light and looking at a mirror. He asked the question as to whether he would be able to see his own reflection.

a) Outline one possible answer to Einstein's question and the problems involved in your answer in terms of the principle of relativity.

b) What was Einstein's conclusion to this thought experiment?

c) The theory of relativity discusses the physical consequences of a universal frame of reference. The special theory of relativity, published in 1905 by Albert Einstein, is concerned with problems involving inertial frame of reference. Its fundamental principles, however, caused discrepancies in measurements.

Describe TWO apparent discrepancies caused by these fundamental principles.

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Step 1

**Part A:**

The answer to the question is that the he can see his reflection in the mirror.

**Part B:**

His conclusion through the answer is that speed of light is independent of the frame of reference i.e. It does not matter whatever the speed of the observer (or) from which frame of reference he measures, the speed of light, it is always the same (299,792,458 m/s)

Step 2

The two fundamental dispensaries caused by these principles are Time Dilation and Length Contraction.

Time dilation is phenomenon where ...

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