A student carries out the experiment of tracing the path of a ray of light through a rectangular glass slab, - Science - Light - Reflection and Refraction

Question

A student carries out the experiment of tracing the path of a ray
of light through a rectangular glass slab, for two different values
of angle of incidence: angle i=30o and angle
i=45o The set of values of the angle of refraction and
the angle of emergence,she is likely to observe in the two
cases,are
A)angle r=20 ,angle e =30 and angle r=28 , angle e=45
B)angle r=30, angle e=20 and angle r =45,angle e=28

how to find the angle of refraction? pls eplain

Pintu B. · Accepted Answer

Dear Student ,
According to the Snell's law we get ,
Sin i Sin r=1·5⇒r=sin-1Sin i 1·5Where r is the angle of refraction and i is angle of incidence

Applying this method you can answer this question
Regards