What is monochromatic light?

Monochromatic light is electromagnetic radiation (visible or invisible) of a certain wavelength.

In theory, monochromatic light has precisely only one wavelength, but in practice this is not possible, and therefore monochromatic light always consists of a (small) bandwidth of wavelengths. If monochromatic light is in the visible spectral range, the colour that can be perceived by the human eye is called the spectral colour. A monochromator isolates monochromatic light from a broadband light source; lasers generate monochromatic light directly.

What is monochromatic light?

Theoretically, monochromatic light has only one wavelength. In practice, light with a small bandwidth is called monochromatic.

How is monochromatic light created?

Monochromatic light can be isolated from polychromatic light using a monochromator.

What does monochromatic light look like?

Monochromatic light in the visible wavelength range is perceived as spectral colour.