Question

a ray of light falls normally on one face of glass with refractive index 1.5. After refraction from the second surface it goes along the surface. Calculate the refracting angle and draw its diagram. *NO SPAM ANSWERS PLEASE..*​

Answer 1

if a light ray falls normally to a surface it passes through it undeviated..

Therefore angle of incidence is equal to the angle of emergence which is equal to 90degrees