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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsAtomic structureEasy2 minPYQ_2010

PhysicsEasysingle choice

In a double slit experiment, $5^{th}$ dark fringe is formed opposite to one of the slits, the wavelength of light is

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Answer:

Solution:

For dark fringe, $\frac{x d}{D} = (2 m - 1) \frac{λ}{2}$ Here, $m = 5, x = \frac{d}{2}$
$∴ \frac{d}{2} \cdot \frac{d}{D} = (2 \times 5 - 1) \frac{λ}{2}$ or $\frac{d ^{2}}{D} = 9 λ$ $∴$ Wavelength, $λ = \frac{d ^{2}}{9 D}$

Stream:VITEEESubject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: PYQ_2010

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