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Question: Answered & Verified by Expert
A star is moving away from the earth with speed
v. Change in wavelength $d \lambda$ observed on earth is
PhysicsWaves and SoundCOMEDKCOMEDK 2016
Options:
  • A $\lambda v / c$
  • B $\lambda v /(c+v)$
  • C $\lambda c /(c+v)$
  • D $\lambda c / v$
Solution:
1463 Upvotes Verified Answer
The correct answer is: $\lambda v / c$
The Doppler shift in wavelength of light from star is given by
$d \lambda=\frac{\lambda v}{c}$

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