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JEE PHYSICS MCQ: WAVE OPTICS

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The

6563 \mathop {\text{A}}\limits^ \circ \mathrm{H}_\alpha

sign line emitted by hydrogen in a star is found to be red-shifted by

15 \mathop {\text{A}}\limits^ \circ

. Estimate the speed with which the star is receding from the earth.

View answer and explanation

Correct option: B

6.86 {~m} / {s}

receding the earth

Option B (

6.86 {~m} / {s}

receding the earth) is correct because it is calculated using the Doppler shift formula for light, considering the red-shift.

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