Question

Which of the following waves is infrasonic?

A) 4 MHz.
B) 400 kHz.
C) 28 Hz.
D) 2 Hz.

Answer 1

The infrasonic wave is the one with a frequency of 2 Hz.

Step-by-step explanation:

The infrasonic waves are the ones with frequencies below 20 Hz. Out of the given options, the only wave that falls within the infrasonic range is option D) 2 Hz.