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Sound — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceSound1 Mark
Question
Light waves:
✓

Answer

  1. None of these
Explanation:
A mechanical wave is a wave that needs a material medium like air, water, steel, etc. for its propagation. It cannot travel through a vacuum. Light is not a mechanical wave. It does not require any material medium for its propagation.

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