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LogosPlease t1_ja5mep0 wrote

In Both instances materials are absorbing the energy of waves. So, sound CAN be blocked entirely, you just need enough material to absorb it. The major differences in how sound and light differ is because of the type of energy they carry. Sound waves use the mass that it is traveling through and moving to create a force... and lightwaves carry electromagnetic radiation (with no mass) that can transmute energy fields and energy onto certain molecules and not others. This lets light travel through certain molecules without effecting them much since they may not be effected by the electric or magnetic field. Sound uses the mass it is propagating through to transmit energy and so it inherently vibrates all mass around it regardless of the material.

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Light waves and sound waves are different. Lightwaves are teeny tiny little packets of energy that almost have no mass and can go through certain materials and interact with other materials based off how those materials absorb energy. For example light in the visible spectrum can go through glass carbonate but not wood carbonate.

Sound waves are made from any kind of matter that does have mass. That mass bounces off other masses and your ears record the frequencies of those waves bouncing and creates a perception of sound.

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IcyPause7334 OP t1_ja5n4l0 wrote

The wifi and cellular signal spreads like electromagnetic waves so they do not have mass which means that they can be blocked entirely like light?

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LogosPlease t1_ja5nhll wrote

Yes, you are exactly right...and, the wifi and radio waves ARE electromagnetic waves! they are exactly like visible light just wifi and radio waves, microwaves, etc., moves in a different frequency. Your eyes can only pick up certain frequencies of Electromagnetic radiation so we can only see small amounts of the frequency spectrum but like you said, with the right materials almost all of any radiation can be blocked, it just depends what materials you are using and what frequency the radiation is. All different radiation frequencies are absorbed differently by all materials so it is likely that all frequencies have at least one material where where 99.9% of energy is absorbed and more often than not there are multiple different

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RythmicBleating t1_ja5qql6 wrote

X-rays are a fun example too: your bones block them but not soft tissue, so if you use the right film you can see right through yourself!

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