Question

please tell the solution fast​

Answer 1

The refracting faces of the glass prism should be smooth, transparent and without any air bubble or broken edge. It must be a triangular.

Use a sharp pencil to draw boundary of the prism and rays of light.

The alpins should have sharp tip and should be fixed exactly vertical to the plane of the paper.

The distance between the alpins should be atleast 6 cm. It provides the greater accuracy in finding the direction of incident ray and refracted ray