Question

When light passes from medium 1 to medium 2, the refractive index of medium 2 with respect to medium 1 is called as___.

• A. Relative refractive index
• B. Absolute refractive index
• C. Refraction
• D. Reflection

Answer 1

The correct option is A Relative refractive index

The relative refractive index is the ratio of the speed of light in medium 1 to speed of light in medium 2, when light passes from medium 1 to another medium 2. It is also equal to the ratio of absolute refractive index of medium 2 to the absolute refractive index of medium 1. Relative refractive index of a medium with respect to a given medium is constant irrespective of the direction of light ray.