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Q.

The wavelength of light received  from a galaxy is 10% greater than that received from identical source on the earth. The velocity of the galaxy relative to the earth is

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a

3 x 108 ms–1

b

3 × 107 ms–1

c

3×106 ms-1

d

3 × 105ms–1

answer is B.

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∆λλ=VC=10100 V=3×107ms-1
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