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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionEasy2 minPYQ_2020

PhysicsEasysingle choice

A ray of light is incident at an angle of incidence 'i' on one surface of a thin prism of small angle 'A'. The ray emerges normally from the opposite surface. If the refractive index of the material of the prism is ' $μ$ ', the angle of incidence 'i' is nearly equal to

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Solution:

$μ = \frac{s i n i}{s i n r} = \frac{i}{r _{1}}$ if angles are small. $A = r_{1} + r_{2} = r_{1}$ since $r_{2} = 0$ since the ray emerges normally. $∴ μ = \frac{i}{A}$ or $i = μ A$

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

⏱ 2mℹ️ Source: PYQ_2020

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