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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

If velocity of a galaxy relative to earth is $1.2 \times 10^{6} m s^{- 2}$ then $%$ increase in wavelength of light from galaxy as compared to the similar source on earth will be

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Answer:

Solution:

Since $\frac{υ}{c} = \frac{∆ λ}{λ}$

$∴ ∆ λ = \frac{υ}{c} \times λ$

Or $\frac{∆ λ}{λ} = \frac{1.2 \times 10^{6}}{3 \times 10^{8}} = \frac{12}{3} \times \frac{10^{5}}{10^{8}} = 4 \times 10^{- 3}$

$\frac{Δ λ}{λ} \times 100 = 0.4$ i.e., $0.4 %$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Wave OpticsSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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