R P Goyal and S P Tripathi Solutions for Chapter: Refraction of Light at Plane Surfaces, Exercise 4: EXERCISE-4(D)

What is meant by the statement the critical angle for diamond is $24°$?

What is total internal reflection?

State two conditions necessary for total internal reflection to occur.

In the given figure a ray of light $PQ$ is incident normally on the face $AB$ of an equilateral glass prism. Complete the ray diagram showing its emergence into the air after passing through the prism.

Write the angles of incidence at the faces $AB$ and $AC$ of the prism.

In the given figure a ray of light $PQ$ is incident normally on the face $AB$ of an equilateral glass prism. Complete the ray diagram showing its emergence into the air after passing through the prism.

Name the phenomenon which the ray of light suffers at the face $AB$, $AC$ and $BC$ of the prism.

The refractive index of air with respect to glass is expressed as

${}_g{\mu }_a=\frac{\sin i}{\sin r}$.

Write down a similar expression for ${}_a{\mu }_g$ in terms of the angles $i$ and $r$.

Draw a neat labelled ray diagram to show the total internal reflection of a ray of light normally incident on one face of a $30°, 90°, 60°$ prism.

Two isosceles right –angled glass prisms are placed near each other as shown in the following figure. Complete the path of the light ray entering the first prism till it emerges out of the second prism.