Question

Name the factors affecting critical angle for the pair of media.

Answer 1

1. The critical angle is the ray angle of incidence for which the angle of refraction is 90 is called the critical angle.
2. Factors affecting the critical angle for the pair of media are:
   (i) Effect of colour: Critical angle increases with increases in wavelength of light.
   (ii) Effect of temperature: Critical angle increases with an increase in temperature.