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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionMedium2 minQB

PhysicsMediumsingle choice

A ray of light is incident normally on the first refracting face of the isosceles prism of refracting angle $A$ . The ray of light comes out at grazing emergence. If one half of the prism (shaded position) is knocked off, the same ray will

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Answer:

Solution:

Grazing emergence at the second face: $μ sin A = 1$

After removal the ray meets the vertical cut at incidence angle $A /2$

$sin e = μ sin \frac{A}{2} = \frac{sin ( A /2 )}{sin A} = \frac{1}{2 cos ( A /2 )}$

$e = sin^{- 1} (\frac{1}{2} sec \frac{A}{2})$

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

⏱ 2mℹ️ Source: QB

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