Question

Explain why white light disperses into different colours, when it is passed through a prism

Answer 1

different wavelengths if light have different speeds and hence different dispersion angles

Answer 2

answer is

These colors are often observed as light passes through a triangular prism. Upon passage through the prism, the white light is separated into its component colors - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion.