Question

The frequency of a wave is 5 Hz. The type of wave refers to

• A. ultrasonic
• B. microwave
• C. infrasonic
• D. radio wave

Answer 1

The correct option is C

infrasonic

The explanation for the correct option:

1. Infrasound or infrasonic, in its popular definition, is sound below a frequency of 20 Hz.
2. It is a term used to determine the frequency of the sound vibration Infrasound has a range of 0.1 Hz to 20 Hz.
3. Hence, the wave refers to an infrasonic wave that has a frequency of 5 Hz.

The explanation for the incorrect option:

1. Ultrasonic is used for ultrasound waves and is defined as waves with a frequency of more than 20 kHz.
2. The microwave frequency range is about 1 GHz to 1000 GHz.
3. The radio wave frequency range is about 3 kHz to 300 GHz.

Hence, option (c) is correct.