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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsYDSEEasy2 minQB

PhysicsEasysingle choice

In the double slit experiment, $5 t h$ dark fringe is formed opposite to one of the slits. The wavelength of light is

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Answer:

Solution:

For dark fringe,

$\frac{Y d}{D} = (2 m - 1) \frac{λ}{2}$

Here, $m = 5, Y = \frac{d}{2}$

$∴ \frac{d}{2} \frac{d}{D} = (2 \times 5 - 1) \frac{λ}{2}$

Or $\frac{d^{2}}{D} = 9 λ$

$∴ λ = \frac{d^{2}}{9 D}$

Stream:JEESubject:PhysicsTopic:Wave OpticsSubtopic:YDSE

⏱ 2mℹ️ Source: QB

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