The speed of light in media ${M_1}$ and ${M_2}$ is $1.5\,\, \times \,\,{10^8}\,m/s$ and $2.0\,\, \times \,\,{10^8}\,\,{\rm{m}}/{\rm{s}}$ 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

Equal to ${\sin ^{ - 1}}\,\,\left( {\frac{2}{3}} \right)$

Equal to or less than ${\sin ^{ - 1}}\,\,\left( {\frac{3}{5}} \right)$

Less than ${\sin ^{ - 1}}\,\,\left( {\frac{2}{3}} \right)$

JEE PHYSICS MCQ: RAY OPTICS

1 Medium

1 of 1

Application +4 | -1

The speed of light in media

{M_1}

and

{M_2}

1.5\,\, \times \,\,{10^8}\,m/s

and

2.0\,\, \times \,\,{10^8}\,\,\mathrm{m}/\mathrm{s}

respectively. A ray of light enters from medium

{M_1}

{M_2}

at an incidence angle

i

. If the ray suffers total internal reflection, the value of

i

View answer and explanation

Correct option: C

Equal to or greater than

{\sin ^{ - 1}}\,\,\left( {\frac{3}{4}} \right)

Option D (

4 \pi \\,{rad}\\, {s}^{-1}

) is correct because angular momentum is conserved, and when the moment of inertia decreases, the angular velocity increases proportionally.