When I go through Electroencephalography,
Band Frequency (Hz) Delta < 4 Theta ≥ 4 and < 8 Alpha ≥ 8 and < 14 Beta ≥ 14
How much are wave length of brain wave?
Thanks for Bryan Krause's comment,"Brain waves" aren't EM waves,but mechanical wave has width as we known.
And it's obvious brain wave is some kinds of wave, with frequency and scale.
When someone is awake, with his eyes closed, the EEG is dominated by the α (alpha) band. This type of waves is characterized by a frequency of 8-13 Hz and a normal width <50 microvolts (µV).
If the subject opens his eyes, α waves disappear and another wave type becomes evident: the β (beta) type. These brainwaves have a higher frequency (30-35 Hz) and a width of 25-30 µV.
Then I still want to know Does brain wave has wave length?.