The speed of light in media M1 and M2 are 1.5×108 m/s and 2.0×108 m/s respectively. A ray of light enters from medium M1 to M2 at an incidence angle i. If the ray suffers total internal reflection, the value of i is :
Equal to sin−1(23)
Equal to or greater than sin−1(34)
Equal to or less than sin−1(35)
Less than sin−1(23)
A
Equal to sin−1(23)
B
Equal to or less than sin−1(35)
C
Equal to or greater than sin−1(34)
D
Less than sin−1(23)
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Solution
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For the given question, sinc=c1c2=1.52=34 Therefore, c=sin−134 So to suffer total internal reflection i>sin−134
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