Question

define monochromatic light in yr words

Answer 1

Monochrome[1] describes paintings, drawings, design, or photographs in one color or values of one color.[2] A monochromatic object or image reflects colors in shades of limited colors or hues. Images using only shades of grey (with or without black or white) are called grayscale or black-and-white. However, scientifically speaking, monochromatic light refers to visible light of a narrow band of wavelengths

Answer 2

In physics, monochromatic describeslight that has the same wavelength so it is one color. Broken into Greek roots, the word shows its meaning: monos means one, and khroma means color.

(I can't understand what do you mean by "in year words")