Physics - Geometrical Optics Question with Solution | TestHub
PhysicsGeometrical OpticsTIR/Prism and DispersionEasy2 minQB
PhysicsEasysingle choice
White light is incident from under water on the water-air interface. If the angle of incidence is slowly increased from zero, the emergent beam coming out into the air will turn from
Options:
Answer:
B
Solution:
Violet has the smallest critical angle
As the angle increases violet undergoes total internal reflection first, then the other colours
Red is the last to go, so the beam turns from white to red
Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:TIR/Prism and Dispersion
⏱ 2mℹ️ Source: QB
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