3.11 identify the order of the electromagnetic spectrum in terms of decreasing wavelength and increasing frequency, including the colours of the visible spectrum

The electromagnetic spectrum is grouped into seven types of waves that have different wavelengths. The order is...

Radio waves (longest wavelength)
Microwaves
Infrared waves
Visible Light
Ultraviolet
X-Rays
Gamma rays (shortest wavelength)

NOTE: I use this song to remember the order... https://www.youtube.com/watch?v=ZPwG4zZNOu4


The colours of the visible light spectrum also depend on wavelength. The order is

Red (longest wavelength)
Orange
Yellow
Green
Blue
Indigo
Violet

NOTE: a good way to remember this is Richard Of York Gave Battle In Vain (sorry, may only work for english students as we learn this is history when were like 5 but if you can, try and remember it. Otherwise, if you have any other acronyms that are easy to remember, please comment them!)