Question

Draw a ray diagram when incident ray falls normally on one of the two equal sides of a right angled isosceles prism having refractive index root3

Answer 1

Answer:

Since light get Total internal reflection on second face of prism so Ray diagram is shown here

Explanation:

As we know that the prism is isosceles prism of right angle

So here we have

A = 45

now light incident normally on one of the face so here we have

$r_1 = 0$

now angle of incidence on the other face of the prism is 45 degree

so we have

$r_2 = 45$

now we know that refractive index of prism is

$\mu = \sqrt3$

now for critical angle of the prism we have

$\mu sin\theta_c = 1$

$sin\theta_c = \frac{1}{\sqrt3}$

$\theta_c = 35.3 degree$

so when light incident on second surface will get reflected on second surface

#Learn

Topic : Total internal reflection

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