The speed of light in media M 1 and M 2 are 1.5 × 10 8 m/s and 2.0 × 10 8 m/s respectively. A ray of light enters from medium M 1 to M 2 at an incidence angle i. If the ray suffers total internal reflection, the value of i is
A
Equal to sin –1 
B
Equal to or less than 
C
Equal to or greater than 
D
Less than 
Text Solution
Verified by ExpertsThe correct answer is:
C
Refractive index for medium M 1 is
Refractive index for medium M 2 is
For total internal reflection
sini ≥ sinC
where i = angle of incidence
C = critical angle
But sinC = 
⇒ i > 
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