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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsDiffractionHard2 minPYQ_2021

PhysicsHardsingle choice

In biprism experiment, $6^{th}$ bright band with wavelength ' $λ_{1}$ ' coincides with $7^{th}$ dark band with wavelength ' $λ_{2}$ ' then the ratio $λ_{1} : λ_{2}$ is (other setting remains the same)

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Answer:

Solution:

$Distance of 6^{th} bright band = \frac{6 λ _{1} D}{d} Distance of 7^{th} dark band = \frac{6.5 λ _{2} D}{d} ∴ \frac{6 λ _{1} D}{d} = \frac{6.5 λ _{2} D}{d} ∴ \frac{λ _{1}}{λ _{2}} = \frac{6.5}{6} = \frac{13}{12}$

Stream:MHT_CETSubject:PhysicsTopic:Wave OpticsSubtopic:Diffraction

⏱ 2mℹ️ Source: PYQ_2021

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