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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionHard2 minPYQ_2007

PhysicsHardsingle choice

A small coin is resting on the bottom of a beaker filled with liquid. A ray of light from the coin travels upto the surface of the liquid and moves along its surface. How fast is the light travelling in the liquid?

Options:

Answer:

Solution:

$∵ \frac{1}{μ} = sin θ_{c} = \frac{3}{5}$ $\Rightarrow μ = \frac{5}{3} And v = \frac{c}{μ} = \frac{3 \times 1 0 ^{8}}{5/3} = \frac{9}{5} \times 1 0^{8} = 1.8 \times 1 0^{8} ms^{- 1}$

Stream:NEETSubject:PhysicsTopic:Geometrical OpticsSubtopic:TIR/Prism and Dispersion

⏱ 2mℹ️ Source: PYQ_2007

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