Question

A rocket is going away from the earth at a speed of 10⁶ m/s If the wavelength of the light wave emitted by it be $5700 \AA$, what will be its Doppler's shift
(a) $200 \AA$
(b) $19 \AA$
(c) $20 \AA$
(d) $0.2 \AA$

Answer 1

I think the answer is option ( a).
Hope this answer helps you in your studies please mark it as brainlist answer.