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Sound — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceSound1 Mark
MCQ
If frequency of a wave is $5 Hz$, then it is:
  • A
    Ultrasonics
  • B
    Microwaves
  • ✓
    Infrasonics
  • D
    Radio waves
✓

Answer

Correct option: C.
Infrasonics

Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than $20 \ Hz$ or cycles per second, the "normal" limit of human hearing.
So $5Hz$ is infrasonic.

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