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Q.

If the shift of wavelength of light emitted by a star is towards blue, this shows that star is

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a

Stationary

b

Moving towards earth

c

Moving away from earth

d

Moving around the earth

answer is B.

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Detailed Solution

Shifting towards ultraviolet region shows that Apparent wavelength decreased. Therefore the source is moving towards the earth

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If the shift of wavelength of light emitted by a star is towards blue, this shows that star is