It's called infrared light outside one end of the spectrum,
and ultraviolet light outside the other end.,
It is called Visible light Spectrum.
You probably mean "Spectrum".
A light spectrum that is not continuous is called a discrete or discontinuous spectrum. This means that instead of a smooth progression of colors, there are distinct individual colors or wavelengths present in the spectrum.
No reason. Light is an electromagnetic wave so you can call any part of the spectrum either.
the electromagnetic spectrum
White light can be split up into lots of different coloured light waves using a prism. We call this range of colours the visible spectrum.
Is spectrum too simplistic an answer?
White light can be split up into lots of different coloured light waves using a prism. We call this range of colours the visible spectrum.
The spectrum that encompasses all wavelengths of light is known as the electromagnetic spectrum. It includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays, ranging from longer wavelengths with lower frequencies to shorter wavelengths with higher frequencies.
The visible light spectrum (wavelengths from 380 to 700 nanometers)
We call that the visible or optical spectrum.
We call the arrangement of all forms of light according to their wavelengths and frequencies the electromagnetic spectrum. It includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.