Question

A ray of light travelling in air strikes the surface of glass at angle of ${45}^{\circ }$. The angle of refraction in the glass will be :

• A. less than ${45}^{\circ }$
• B. More than ${45}^{\circ }$
• C. zero
• D. none of these

Answer 1

Answer: (A)

less than ${45}^{\circ }$

According to law of refraction if a ray travels from rarer to denser medium the ray of light bends towards the normal.So,if a ray of light travelling in air strikes the surface of glass at angle of ${45}^0$, then the angle of refraction in the glass will be less than ${45}^0$.