Question

Why LASER cannot be dispersed?

• A. Because it is a combination of Violet and Red colour
• B. Because it is a composite
• C. Because it is not composite
• D. Because it is a combination of Orange and Red

Answer 1

The correct option is C

Because it is not composite

The laser beam is a highly monochromatic source of light. It consists of only one wavelength and hence does not get dispersed by using a glass prism. Prisms split light because different colours of light get refracted by different amounts. If we shine something that's a combination of colours (e.g. white light), it spreads out into a full spectrum of colours. Laser light cannot be dispersed because it is not a composite ( combination of different colours)