Question

which of the electromagnetic wave has minimum frequency?​

Answer 1

Extremely low frequency (ELF) is the ITU designation for electromagnetic radiation (radio waves) with frequencies from 3 to 30 Hz, and corresponding wavelengths of 100,000 to 10,000 kilometers, respectively. In atmospheric science, an alternative definition is usually given, from 3 Hz to 3 kHz.

Extremely low frequency -

Answer 2

radio waves has minimum frequency 3*10^7Hz