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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 × 107 ms–1

b

3 × 105ms–1

c

3 × 108 ms–1

d

3 × 106ms–1

answer is B.

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Detailed Solution

Δλ/λ=V/c 0.1=v/3×10∧8v=3×10∧8×0.1v=3×10∧7m/s

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