Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionEasy2 minPYQ_2020

PhysicsEasysingle choice

If light travels a distance $x$ in time $t_{1}$ in air and $10 x$ distance in time $t_{2}$ in a certain medium, then find the critical angle for total internal reflection, of the medium.

Options:

Answer:

Solution:

$μ = \frac{\frac{x}{t_{1}}}{\frac{10 x}{t_{2}}} = \frac{t_{2}}{10 t_{1}}$
$\sin θ_{c} = \frac{1}{t_{2} / 10 t_{1}} = \frac{10 t_{1}}{t_{2}} \Rightarrow θ_{c} = s i n^{- 1} (\frac{10 t_{1}}{t_{2}})$

Subject:PhysicsTopic:Geometrical OpticsSubtopic:TIR/Prism and Dispersion

⏱ 2mℹ️ Source: PYQ_2020

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