wave-optics

Question: A rocket is going away from the earth at a speed 0.2c, where c = speed of light. It emits a signal of frequency $4 \times {10^7}Hz$. What will be the frequency observed by an observer on the earth

1) $4 \times {10^6}Hz$

2) $3.2 \times {10^7}Hz$

3) $3 \times {10^6}Hz$

4) $5 \times {10^7}Hz$

Solution:

Explanation: No Explanation

Doppler's Effect of Light

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