Question

State the conditions for the phenomenon of total internal reflection to occur. Calculate the speed

of light in a medium whose critical angle is 300

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Answer 1

n= 1/sinC = 1/sin30º = 2

Speed of light in medium v = c/n = (3 x10⁸)/2 = 1.5 x 10⁸m/s

= 1.5 x 10⁸m/s