Physics - Geometrical Optics Question with Solution | TestHub
PhysicsGeometrical OpticsTIR/Prism and DispersionMedium2 minQB
PhysicsMediumsingle choice
Figure shows a transparent block of front sides 'a' and 'a'. The third dimension of the block is negligible. A point source S which can emit light in all directions can move inside the block. It is desired that no light of 'S' should pass through AB. The region in which S should be present to satisfy this condition shown by shaded region. Choose correct option.
Options:
Answer:
B
Solution:
With , the critical angle is
If S lies anywhere in the shaded region of option B, every ray reaching face AB strikes it at an angle greater than the critical angle and is totally internally reflected, so no light passes through AB.
Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:TIR/Prism and Dispersion
⏱ 2mℹ️ Source: QB
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