One part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

White light is the answer.

Also known as visible light consist of a spectrum of different waves. Technically, white is not a color or a wavelength characterized by a white color. Rather, White light is a combination of many colors of the visible spectrum. It shows the full spectrum of electromagnetic spectrum.

No solution : there is no number of boxes that she bought