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Q. 6

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 1059

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Short Answer

A starship blasts past the earth at . Just after passing the earth, it fires a laser beam out the back of the starship. With what speed does the laser beam approach the earth?

The speed will be speed of light C.

See the step by step solution

Step by Step Solution

Step 1: Given information

We have given,

the speed of the blasts =

We have to find the speed of the blasts light which approach earth.

Step 2:@ Simplify

According to Einstein's principle of relativity ,the speed of the light will be always same in all inertial frame irrespective to the speed of the frame.

So, that is why the speed of the blasts light will be speed of the light c.


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