nuclear spin flips*
>1 mm
<3x10
11
radio waves
molecular rotations,
electron spin flips*
1 mm-25 µm
3x10
11
-10
13
microwaves
molecular vibrations
25 µm-2.5 µm
10
13
-10
14
infrared
outer electron molecular
vibrations
2.5 µm-750 nm
1x10
14
-4x10
14
near-infrared
outer electron
750 nm-400
nm
4-7.5x10
14
visible
outer electron
400 nm-1 nm
10
15
-10
17
ultraviolet
inner electron
1 nm-1 pm
10
17
-10
20
X-rays
nuclear
<1 pm
10
20
-10
24
gamma-rays
Type of Transition
Wavelength
Range
Frequency
Range (Hz)
Type of
Radiation
Electromagnetic Spectrum