Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

The wavelength of $H_{α}$ line in the hydrogen spectrum is found to be $6563 Å$ in the laboratory. If the velocity of the milky way is $1.05 \times 10^{6} m s^{- 1}$ , then the wavelength of $H_{α}$ line in the spectrum of milky way will be

Options:

Answer:

Solution:

As $λ = ∆ λ \times \frac{c}{v}$ or $∆ λ = λ \times \frac{v}{c}$

$∆ λ = \frac{6563 \times 1.05 \times 10^{6}}{3 \times 10^{8}} Å = 2297 \times 10^{- 2}$

$= 22.97 Å \approx 23 Å$

$∴$ New wavelength is $(6563 + 23) Å$

$= 6586 Å$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Wave OpticsSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...