PDF chapter test TRY NOW

1. Define the refractive index of a medium.
 
The amount of refraction of light in a medium is denoted by a term known as the refractive index of the medium, which is the ratio of the to the .
 
It is also known as the absolute refractive index, and it is denoted by the Greek letter -
  
2. State Snell’s law of refraction.
 
Snell’s laws of refraction are given below:
 
• The incident ray, the refracted ray and the normal at the point of intersection, .
 
• The ratio of the  to the  is equal to the  of the medium, which is a constant.