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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsDiffractionMedium2 minPYQ_2021

PhysicsMediumsingle choice

A single slit diffraction pattern is formed with white light. For what wavelength of light, the $3^{rd}$ secondary maximum in diffraction pattern coincides with the $2^{nd}$ secondary maximum in the pattern of red light of wavelength $6000 \overset{˚}{A}$ ?

Options:

Answer:

Solution:

$Distance of nth maximum y_{n} = (n + \frac{1}{2}) \frac{λ D}{a} ∴ y_{2} = (2 + \frac{1}{2}) \frac{λ _{1} D}{a} and y_{3} = (3 + \frac{1}{2}) \frac{λ _{2} D}{a} ∴ 2.5 λ_{1} = 3.5 λ_{2} ∴ 2.5 \times 6000 = 3.5 λ_{2} ∴ λ_{2} = \frac{2.5 \times 6000}{3.5} ≃ 4300 A$

Stream:MHT_CETSubject:PhysicsTopic:Wave OpticsSubtopic:Diffraction

⏱ 2mℹ️ Source: PYQ_2021

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