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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionMedium2 minQB

PhysicsMediumsingle choice

A light ray falls normally on one face of a prism. The prism is isosceles with angles as shown. If the light ray suffers two internal reflection and its path is as shown then what should be the condition on the angle of the prism? It is given that $∠ B A C = θ$ .

Options:

Answer:

Solution:

Ray enters $A B$ normally and meets $A C$ at incidence angle $θ$

Total internal reflection needs $sin θ > \frac{1}{μ}$

$μ > cosec θ$

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

⏱ 2mℹ️ Source: QB

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