A ray of light is incident on a glass sphere from water as shown. If μ glass = 
and μ water = 
. The angle of incidence θ so that the ray which enters the sphere does not come out of the sphere is –
A
tan –1 
B
90 0
C
tan –1 (2)
D
sin –1 
Text Solution
Verified by ExpertsThe correct answer is:
B
In ΔΑΟΒ
ΑΟ = ΟΒ
⇒ ∠ r = ∠ c
μ w sin θ = μ g sin c …. (1)
& sin c = 
…. (2)
∴ sin θ = 
× 
⇒ θ = 90 0
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