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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionMedium2 minQB

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The cross section of a glass prism $μ = 2$ has the form of an isosceles right angled triangle. It is submerged in a liquid of refractive index $1.2$ . A ray is incident on to one of the equal faces perpendicularly. The angle between the direction of incident ray and the ray that emerges from the prism is

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Answer:

Solution:

Critical angle: $sin C = 1.2/2 = 0.6$ , so $C \approx 3 7^{\circ}$

Ray hits the hypotenuse at $4 5^{\circ} > C$ , so total internal reflection

Reflected ray turns by $9 0^{\circ}$ and leaves the other equal face normally

Angle between incident and emergent ray $= 9 0^{\circ}$

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

⏱ 2mℹ️ Source: QB

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