Home Physics Electron, Photon, Photoelectric Effect and X-rays NCERT Light coming from a star is observed to have…
Physics Electron, Photon, Photoelectric Effect and X-rays NCERT MCQ (Single Correct)

Light coming from a star is observed to have a wavelength of , while its real wavelength is 3700 A. The speed of the star relative to the earth is [Speed of light ]

A
B
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D

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The correct answer is:
B

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