Question

A white light is a mixture of ___

Answer 1

Electromagnetic radiation is a type of energy that includes light. Radio waves, microwaves, ultraviolet rays, and X-rays are only a few examples of electromagnetic radiation. A distinct wavelength distinguishes each type. Radio waves, for example, can be many miles long, but gamma rays are the size of atoms. The visible light that humans perceive is located in the centre of this "electromagnetic spectrum."

Complete answer:
Although visible light is only a small portion of the electromagnetic spectrum, there are several wavelength variations. Colors are how we perceive these variances. Red light, which has the longest wavelength, is at one extreme of the spectrum. The shortest wavelength is blue or violet light. White light is a mix of all the hues in the visible spectrum. It comes in every colour of the rainbow. Secondary colours, such as yellow, cyan, and magenta, are created by combining main light colours such as red, blue, and green. The three fundamental colours may be broken down into various combinations to create all additional colours.
The Newton disc is a well-known physics experiment in which a revolving disc with distinct coloured segments appears white (or off-white or grey) when spun very quickly. Temporal optical mixing is a form of additive-averaging mixing in which light stimuli are mixed in this way. Persistence of vision refers to the idea that human eyesight is unable to identify fine details of fast-moving objects. Isaac Newton is commemorated on the CD. It's unclear if he ever utilised a spinning disc to show the principles of light, despite publishing a circular figure with portions for the primary colours he'd found.

Note: The way particular hues of light reflect and absorb on objects gives them their appearance. A red waggon, for example, appears red because red light is reflected while blue and green light is absorbed. Red and green light are reflected by a yellow banana, while the rest is absorbed.