yellow, cian, magenta
depends on the colours of light it reflects.
Primary and secondary colours of light are red, blue, green, yellow, cyan, magenta.
Electromagnetic radiation consists of both electric and magnetic components in each wave source.
The frequency range is divided into separate bands
shorter wavelengths more energy
longer wavelengths less energy.
where they stick together
where they spread apart
the distance the particle moves
the distance between two regions of compression.