Class 8 Physics Sound Sound needs a medium for propagation

Sound can propagate through solids, liquids and gases. In fact, it needs a medium to propagate, be it solid, liquid or gases. It cannot propagate through vacuum.

Sound can propagate through Solids: The doctor checks us using the stethoscope. He can hear the sound from within our body because sound travels through solids


Sound can propagate through liquids: In fact, this is how aquatic animals communicate with each other.

 


Sound can propagate through gases/air: This is the reason why we are able to hear a person standing near us speak.

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