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suppose a rocketship is receding from the earth at a speed of 2/10 th the velocity of light. a light in the rocketship appears blue to the passengers on the ship. what colour would it appear to an observer on the earth

Suppose a rocketship is receding from the earth at a speed of 2/10 th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth ?

A Blue

B Yellow

C Orange

D Yellow-orange

Answer & Explanation
Option: [D]

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