Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveDopler's effectEasy2 minPYQ_2020

PhysicsEasysingle choice

A star is moving away from Earth and shift in spectral line of wavelength $5700 Å$ is $1.90 Å$ . Velocity of the star is

Answer:

Solution:

$∆ λ = \frac{υ}{c} λ$

$∴ υ = \frac{c ∆ λ}{λ}$

Or $υ = \frac{3 \times 10^{8} \times 1.9 \times 10^{- 10}}{5700 \times 10^{- 10}} = 100 k m s^{- 1}$

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

⏱ 2mℹ️ Source: PYQ_2020

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