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JEE PHYSICS MCQ: WAVE OPTICS

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Application +4 | -1

A star moves away from earth at speed 0.8 c while emitting light of frequency

6 \times {10^{14}}Hz

.What frequency will be observed on the earth (in units of

{10^{14}}\;Hz

)(

c =

speed of light)

View answer and explanation

Correct option: B

1.2

Option B (1.2) is correct because the observed frequency is calculated using the Doppler effect formula for receding sources.

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