Optics Question 240

Question: A rocket is moving away from the earth at a speed of 6×107m/s . The rocket has blue light in it. What will be the wavelength of light recorded by an observer on the earth (wavelength of blue light = 4600AA )

Options:

A) 4600AA

B) 5520AA

C) 3680AA

D) 3920AA

Show Answer

Answer:

Correct Answer: B

Solution:

Δλλ=vc=6×1073×108=0.2

Δλ=λλ=0.2λλ=1.2λ=1.2×4600=5520AA



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