Originally published at: https://bigideas.network/electromagnetic-spectrum/
There is an invisible field that underlies the entire universe like a net stretching in every direction.
The field itself is invisible and intangible, but it will ripple with energy. When those ripples are in a very specific wavelength range (i.e. size), human beings can see them as light. The ripples are called photons, and the possible range of wavelengths of the photon is called the electromagnetic spectrum.
The specific range that is visible to us forms the colours of the rainbow - from the smallest ripples creating the colour violet to the largest ones creating red…