Suppose a rocket ship is receding from the earth at a speed of 2 / 10 – McqOptions

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1.	Suppose a rocket ship is receding from the earth at a speed of 2 / 10 th the velocity of light. A light in the rocket ship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth ?
A.	Blue
B.	Orange
C.	Yellow
D.	Yellow-orange
Answer» B. Orange

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