Glass has refractive index μ with respect to air and the critical angle for a ray of light going from glass to air is θ . If a ray of light is incident from air on the glass with angle of incidence θ , the corresponding angle of refraction is -
A
sin –1 
B
90 0
C
sin –1 
D
sin –1 
Text Solution
Verified by ExpertsThe correct answer is:
C
a μ g = 
, μ = 
…(1)
by snell's μ = 
= 
…(2)
sin r = 
by (1) and (2)
sin r = 
⇒ r = sin –1 
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