When a ray of white light falls on a prism, which of the following statements are correct ?

1. The dispersion of white light occurs at the first surface of the prism.
2. The deviation of light rays occurs at both the surfaces of the prism.
3. The prism does not produce colours, but it only splits the various colours present in the white light.
4. All of the above.

All of the above.

Reason —

• The dispersion of white light occurs at the first surface of the prism, where white light separates into its constituent colors due to differences in their refractive indices.
• The deviation of light rays occurs at both surfaces of the prism, where each color of light bends or deviates as it enters and exits the prism due to changes in refractive index.
• The prism does not produce colors but only splits the various colors present in white light.

Hence, all the statements are true.