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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsDiffractionMedium2 minQB

PhysicsMediumsingle choice

A parallel beam of monochromatic light is incident on a narrow rectangular slit of width 1 mm . When the diffraction pattern is seen on a screen placed at a distance of 2 m, the width of principal maxima is found to be 2.5 mm . The wavelength of light is

Options:

Answer:

Solution:

Width of principal maximum: $\frac{2 λ D}{a}$

$\frac{2 λ \times 2}{1 0 ^{- 3}} = 2.5 \times 1 0^{- 3}$

$λ = 6.25 \times 1 0^{- 7} m$

$λ = 6250 \overset{˚}{A}$

Option (A)

Stream:JEESubject:PhysicsTopic:Wave OpticsSubtopic:Diffraction

⏱ 2mℹ️ Source: QB

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