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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound1 Mark
MCQ
If frequency of a wave is 5 Hz, then it is:
  • A
    Ultrasonics
  • B
    Microwaves
  • C
    Infrasonics
  • D
    Radio waves
✓

Answer

  1. Infrasonics

Explanation:

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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