A ray of light travels from water to air

Light (10)

A ray of light travels from water to air as shown in the diagram given below:

  1. Copy the diagram and complete the path of the ray. Given the critical angle for water is 48°.
  2. State the condition so that total internal reflection occurs in the above diagram. 

Answer

i.

ii. ∠𝑖 should be greater than 48°.

Exam Year: 2017