When a ray of light emerges from a block of glass, the critical angle – McqOptions

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1.	When a ray of light emerges from a block of glass, the critical angle is [KCET 1994]
A.	Equal to the angle of reflection
B.	The angle between the refracted ray and the normal
C.	The angle of incidence for which the refracted ray travels along the glass-air boundary
D.	The angle of incidence
Answer» D. The angle of incidence

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