Question

7. A) List out the materials required for the experiment to find the refractive
index of a prism ? Write the proceedure of experiment ?​

Answer 1

Explanation:

Material required : Prism, piece of white chart of size 20 x 20 cm, pencil, pins, scale and protractor. Procedure : Take a prism and place it on the white chart in such a way that the triangular base of the prism is on the chart.Join M and N. A, B, M, N, C, D represent the path of light.

Extend both incident, emergent rays tell they meet at a point ‘O’.

The angle between these two rays is angle of deviation denoted by ‘D’.

Do the same for various angles of incidence such as 40°, 50° etc.

If we take angle of incidence along x-axis and the angle of deviation along y-axis we get the graph as shown in figure.

The refractive index of prism n = sin[(A + D)/2]/sin A/2