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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveDopler's effectEasy2 minPYQ_2020

PhysicsEasysingle choice

When a laser beam returns after reflection from an aeroplane, the observed change in frequency is $1 %$ , then the speed of the aeroplane is ( $c$ is the velocity of light)

Options:

Answer:

Solution:

We know that for change in frequency

$\frac{Δ f}{f} = \frac{2 v}{c}$

$\Rightarrow \frac{1}{100} = \frac{2 v}{c}$

$\Rightarrow v = \frac{c}{200}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Sound WaveSubtopic:Dopler's effect

⏱ 2mℹ️ Source: PYQ_2020

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