Question

A rocket is receding away from earth with velocity 0.2 c. The rocket emits signal of frequency 4 × 10⁷ Hz. The apparent frequency observed by the observer on earth will be(a) 4 × 10⁶ Hz(b) 3.2 × 10⁷ Hz(c) 3 × 10⁶ Hz(d) 5 × 10⁷ Hz

Answer 1

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Option B is Correct