However, perhaps a little less obviously, it is the properties of light that determine how we view an object.
Physicists classify visible light as part of the electromagnetic spectrum.
The non visible parts of the spectrum include radio waves, radar and x-rays. It may seem strange to think of light waves being similar to radio waves, however the only difference between them is their wavelength. Visible light waves form a very small section near the middle of the electromagnetic spectrum. Within this range each wavelength is recognised as a colour. All these wavelengths are emitted by the sun, but greenish waves are emitted with more intensity.