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8 votes
2 answers
5k views

At what speed does information move through the atoms of a rigid object?

How fast does information travel on particles? I thought if you move a iron bar from one end it would take the speed of sound to move its other end. For example, theoretically if you hold an iron bar ...
J Frank's user avatar
  • 97
23 votes
4 answers
2k views

Light propagating through a sound wave

We know that the speed of light depends on the density of the medium it is travelling through. It travels faster through less dense media and slower through more dense media. When we produce sound, a ...
Mrigank Pawagi's user avatar
3 votes
2 answers
2k views

Why light travels slower and sound travels faster in denser mediums?

Speed of light is universally constant so in denser media its collision increases so effective speed will decrease so how we distinguish this effective speed and $3\times10^8$ m/s. But why sound ...
Syed Taha Ahmed's user avatar
4 votes
2 answers
836 views

Is it possible to create an optical medium where sound can travel faster than light?

The speed of light decreases with increase in the density of the optical medium whereas the speed of sound increases with increase in the density of the medium. So is there any possibility to ...
Ananyo Bhattacharya 's user avatar