Two media having speeds of light $2\,\, \times \,\,{10^8}{\rm{ m}}{{\rm{s}}^{ - 1}}$ and $2.4\,\, \times \,\,{10^8}\,\,{\rm{m}}{{\rm{s}}^{ - 1}}$, are separated by a plane surface. What is the angle for a ray going from medium I to medium II?

${\sin ^{ - 1}}\,\,\left( {\frac{5}{{12}}} \right)$

${\sin ^{ - 1}}\,\,\left( {\frac{1}{{\sqrt 2 }}} \right)$

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

JEE PHYSICS MCQ: RAY OPTICS

1 Medium

1 of 1

Application +4 | -1

Two media having speeds of light

2\,\, \times \,\,{10^8}\mathrm{ m}{\mathrm{s}^{ - 1}}

and

2.4\,\, \times \,\,{10^8}\,\,\mathrm{m}{\mathrm{s}^{ - 1}}

, are separated by a plane surface. What is the angle for a ray going from medium I to medium II?

View answer and explanation

Correct option: A

{\sin ^{ - 1}}\,\,\left( {\frac{5}{6}} \right)

Option A (

{\sin ^{ - 1}}\,\,\left( {\frac{5}{6}} \right)

) is correct because it is the critical angle calculated using Snell's law and the given speeds of light in the two media.