It is called red-shift.
It shifts to the longer-wavelength, shorter-frequency direction.
For example, visible light shifts towards the infra-red area of the spectrum.
When the spectrum of light from a star is redshifted, it indicates that the star is moving away from the observer. This is due to the Doppler effect, where the wavelengths of light stretch, causing them to shift toward the red end of the spectrum. Redshift can also suggest the star is part of an expanding universe, as seen in distant galaxies. Overall, redshift is a key indicator of the star's velocity relative to Earth.
Usually, that the object is moving away from us. It may also mean that the light comes from a "gravitational well", that is, that the light has to escape from gravity before it reaches us - this will make the light lose some energy, and shift towards the red part of the spectrum.
Visible light spectrum.
If a star is moving towards Earth. The light is seen as 'blue shifted'. As we look at our sun, on the colour spectrum, black lines appear. When looking at distant stars, we can tell if they are moving away from us (Red shift) or getting closer to us (Blue shift). This is because the black lines shift to the red or blue end of the spectrum depending on which direction the star is travelling.
No, light is not part of the radio spectrum. But, both the radio spectrum and light are part of the electromagnetic spectrum. The electromagnetic spectrum is a range of frequencies from very low to very high. Light frequencies are higher than radio frequencies but both are the same kind of thing.
Most of the light emitted by humans is in the infrared part of the electromagnetic spectrum.
The blue part of the spectrum has more energy than the red part.
It is certainly a very important part, but it is not a major part; 'visible light' makes up only a tiny part of the EM spectrum.
Visible light.
Actually, the part of the electromagnetic spectrum that we can see is called visible light, not ultraviolet light. Ultraviolet light is outside the visible spectrum and is not visible to the human eye.
when dispersed through a prism: Visible spectrum of light (rainbow) part of (very small fraction) electromagnets spectrum
The part of the electromagnetic spectrum that we can see is called visible light. It is the range of electromagnetic radiation that the human eye is sensitive to, with wavelengths between approximately 400 to 700 nanometers.