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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsYDSEEasy2 minPYQ_2020

PhysicsEasysingle choice

In Young's double-slit experiment, $d = 0.1 mm$ , $D = 20 cm$ , and $λ = 5460 Å$ , the angular position of first dark fringe will be

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Answer:

Solution:

Position of dark fringe $y = (2 n - 1) \frac{λ}{2} \times \frac{D}{d} = \frac{λ}{2} \times \frac{D}{d}$

$∴$ Also $θ = \frac{y}{D}$

$= \frac{λ}{2 d} = 2730 \times 10^{- 6} \times \frac{180}{π} = {0.16}^{o}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Wave OpticsSubtopic:YDSE

⏱ 2mℹ️ Source: PYQ_2020

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