NEET UG PHYSICS MCQ: WAVE OPTICS

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Application +4 | -1

A star is moving away from the earth with a velocity of

100\;km/s

. If the velocity of light is

3 \times {10^8}\;m/s

then the shift of its spectral line of wavelength

5700\mathop \mathrm{A}\limits^ \circ

due to Doppler’s effect will be

View answer and explanation

Correct option: B

1.90\mathop \mathrm{A}\limits^ \circ

Option B (

256\mathrm{ }:\mathrm{ }16\mathrm{ }:\mathrm{ }169

) is correct because the intensity is proportional to the square of the amplitude, and the resultant amplitude depends on the number of half-period zones.

NEET UG PHYSICS MCQ: WAVE OPTICS

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