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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsYDSEMedium2 minPYQ_2016

PhysicsMediumsingle choice

Two coherent sources $P$ and $Q$ produce interference at point $A$ on the screen where there is a dark band which is formed between $4^{t h}$ bright band and $5^{t h}$ bright band. Wavelength of light used is $6000 Å .$ The difference between $P A$ and $Q A$ is

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Answer:

Solution:

Here $∆ x = \frac{λ δ}{2 π}$
For $n = 4^{t h}$ dark b and $δ = (2 n + 1) π \Rightarrow δ = (8 + 1) π = 9 π$
$∆ x = \frac{λ . 9 π}{2π} = \frac{9}{2} \times λ = \frac{9}{2} \times 6 \times 10^{- 7} = 2.7 \times 10^{- 6} m$
$= 2.7 \times 10^{- 4} c m$

Stream:MHT_CETSubject:PhysicsTopic:Wave OpticsSubtopic:YDSE

⏱ 2mℹ️ Source: PYQ_2016

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