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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsYDSEEasy2 minPYQ_2020

PhysicsEasysingle choice

The central fringe shifts to the position of fifth bright fringe, if a thin film of refractive index $1.5$ is introduced in the path of light of wavelength $5000 Å$ . The thickness of the glass plate is

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Answer:

Solution:

$(μ - 1) t = n λ$

Or $t = \frac{n λ}{μ - 1} = \frac{5 \times 5000 \times 1 0^{- 10}}{(1.5 - 1)} = \frac{5 \times 5000 \times 1 0^{- 10}}{1 / 2} = 10 \times 5000 \times 1 0^{- 10}$

$= 5 \times 10^{- 6} m = 5 μ m$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Wave OpticsSubtopic:YDSE

⏱ 2mℹ️ Source: PYQ_2020

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