Question

A ray of light, travelling in medium A, is incident on plane interface of two media A and B and gets refracted into medium B. The angle of incidence is i and that of refraction is r. Graph between sin(i) and sin(r) is as shown in diagram. The correct statement among the following is

• A. Speed of light in medium B is three fourth of that in medium A
• B. Total internal reflection can take place
• C. Refraction index of medium A is greater than that of medium B
• D. None of these

Answer 1

Answer: (A)

$\frac{\sin i}{\sin r}=\cot 37=\frac{4}{3}=\frac{V_A}{V_B}$
as going from rarer to denser no TIR can take place
$\frac{{\mu }_B}{{\mu }_A}>1$
$\Rightarrow {\mu }_B>{\mu }_A$