JEE PHYSICS MCQ: WAVE OPTICS

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An electric bulb, connected to a make and break power supply, switches off and on every second in its rest frame. What is the frequency of its switching off and on as seen from a spaceship travelling at a speed

0.8 c?

View answer and explanation

Correct option: A

0.6 \mathrm{~s}^{-1}

Option A (

0.6 \mathrm{~s}^{-1}

) is correct because the frequency is affected by time dilation due to the spaceship's speed, as observed from a different frame of reference.

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