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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at plane surfaceEasy2 minPYQ_2012

PhysicsEasysingle choice

If the velocity of light in vacuum is $3 \times 1 0^{8} ms^{- 1}$ , the time taken (in nanosecond) to travel through a glass plate of thickness $10 cm$ and refractive index 1.5 is

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Given $v = 3 \times 1 0^{8} ms^{- 1}, d = 10 m$ and $μ = 1.5$ Here, $t = \frac{d}{c / μ}$ $t = \frac{10 \times 1 0 ^{- 2}}{2 \times 1 0 ^{8}}$ $(∴ \frac{c}{μ} = \frac{3 \times 1 0 ^{8}}{1.5} = 2 \times 1 0^{8} ms^{- 1})$ $t = 0.5 \times 1 0^{- 9} s$

Stream:WBJEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Refraction at plane surface

⏱ 2mℹ️ Source: PYQ_2012

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