CBSE Class 10 Sample Paper Science Solution - For 2024 Boards

Class 10
Solutions to CBSE Sample Paper - Science Class 10

## The refractive indices of three media are given below:

 Medium Refractive Index A 1.6 B 1.8 C 1.5

## (a) In which of the two cases the refracted ray bends towards the normal?

When the light travels from a medium of low refractive index (rarer medium) to a medium of high refractive index (denser medium), it bends towards the normal.

Since nb>na, the light will bend towards the normal while travelling from medium A to medium B.

## (b) In which case does the speed of light increase in the second medium? Give reasons for your answer.

The speed of light is given by the formula:

v=c/n where c is the speed of light in air and n is the refractive index.

From this formula, it can be concluded that the speed of light in any medium is inversely

proportional to the refractive index of that medium.

So, the speed of light will increase when it travels from B to C as nc>nb