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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsYDSEMedium2 minPYQ_2022

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In a Young's double slit experiment, a student observes $8$ fringes in a certain segment of screen when a monochromatic light of $600 nm$ wavelength is used. If the wavelength of light is changed to $400 nm$ , then the number of fringes he would observe in the same region of the screen is:NEET 2022 (Phase 1)

Options:

Answer:

Solution:

Wavelength of light used is inversely proportional to number of fringes observed.

Hence, we can write:

$n_{1} λ_{1} = n_{2} λ_{2} \Rightarrow n_{2} = \frac{n_{1} λ_{1}}{λ_{2}} = \frac{8 \times (600 \times 10^{- 9})}{(400 \times 10^{- 9})} = 12$

Stream:NEETSubject:PhysicsTopic:Wave OpticsSubtopic:YDSE

⏱ 2mℹ️ Source: PYQ_2022

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