Question

what is the name given to light with single wave length

Answer 1

it is called monochromatic light. it means light consisting of a single colour. each colour corresponds to unique frequency or wavelength

Answer 2

Monochromatic light

Monochromatic light is the name given to the light with single wavelength.

Monochromatic light literally means light of one color because the word "monochromatic" comes from the Greek words "mono" which means meaning single and "chroma" which means color.