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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsDiffractionEasy2 minQB

PhysicsEasysingle choice

Fraunhofer diffraction pattern of a single slit is obtained in the focal plane of the lens of focal length $1 m$ . If the third minimum is formed at a distance of $5 mm$ from the central maximum and wavelength of light used is $5000 \overset{\circ}{A}$ , then the width of the slit will be

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Answer:

Solution:

Using $a \sin θ = n λ$

Or $a . \frac{x}{f} = 3 λ$ or $a = \frac{3 λ . f}{x}$

$= \frac{3 \times 500 \times 10^{- 9} \times 1}{5 \times 10^{- 3}} = 3 \times 10^{- 4} m = 0.03 c m$

Stream:JEESubject:PhysicsTopic:Wave OpticsSubtopic:Diffraction

⏱ 2mℹ️ Source: QB

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