Sound needs a medium for propagation

Sound needs a medium for propagation
Sound is a mechanical wave and needs a material medium like air, water, steel etc. for its propagation. It cannot travel through vacuum, which can be demonstrated by the following experiment.
 Take an electric bell and an airtight glass bell jar.
 The electric bell is suspended inside the airtight bell jar.
 The bell jar is connected to a vacuum pump.
 If you press the switch you will be able to hear the bell.
 Now start the vacuum pump. When the air in the jar is pumped out gradually, the sound becomes fainter, although the same current is passing through the bell.
 After some time when less air is left inside the bell jar you will hear a very feeble sound. What will happen if the air is removed completely? Will you still be able to hear the sound of the bell?
Conclusion: The sound that it produces cannot be heard because there are no particles inside the jar to transport the disturbance through the vacuum. Sound is a mechanical wave and cannot travel through vacuum.
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[@BwalyaMumba-h1h]

So in which state does it travel

[@sushmitak.s.7753]

I have a doubt,
Though light doesn't need a medium to travel, why does it refect? It could just go through it.

[@ramanaa.g.s.b.5969]

How to make this

[@sunderpreetsaini]

very good experimental explaination

[@scienceprojects7130]

Thanks a lot

[@sunderpreetsaini]

please make video on amplitude,frequency of sound

[@scienceprojects7130]

sure we will...

[@zapiegaming]

Thnks for explaining

[@scienceprojects7130]

Keep watching our videos

[@romitpanwar8814]

Tq sir...🤗🤗

[@scienceprojects7130]

u r welcome

[@sunderpreetsaini]

GREAT VIRTUAL LAB FOR VI,VII,VIII,IX,X CLASS SCIENCE

[@scienceprojects7130]

Glad you liked it!

[@shobhashobha7459]

Fuck not done neat