Question

what do you mean by a monochromatic light?

Answer 1

The term monochromatic comes from the Greek words mono, meaning single, and chroma, meaning color. So monochromatic light literally means light of one color. In scientific terms, it means light of a single wavelength. Light is a term for the visible and near visible portions of electromagnetic radiation.

Answer 2

Light which has the same wavelength so it has only one color. Monochromatic light can be produced by lasers. It has a narrow bandwidth. Its used in various experiments like diffiraction, used in forensic science etc.