Question

(b) What do you understand by the statement that refractive index of water is 1.33 ?​

Answer 1

Explanation:

the refractive index of water is 1.33, meaning that light travels 1.33 times as fast in a vacuum as it does in water. This statement means that light travels 1.33 faster in vaccum than in water.

Answer 2

The Refractive index of water = 1.33 implies that the speed of light is 1.33 times higher in a vacuum than in water.

• The Refractive index is a relative term (speed/speed), therefore has no unit.
• The Formula for Refractive index (n) =  speed of light in vacuum(c)/speed of light in water(v)
• Hence the light travels faster in a vacuum than in water.
• As light enters into an optically denser medium from an optically rarer medium, the light rays undergo refraction, bend towards the normal, and experience a decrease in the speed of their traveling.