Speed of waves in different media.

[hss15]

Hey Guys,

I was wondering which types of waves travel faster in optically dense materials and which waves travel slower in optically dense materials. Does light travel faster or slower and same with sound? Do all mechanical and electromagnetic waves follow these properties or does one follow one of the properties and the other one follows the other property?
Please answer these questions as soon as possible!
Thanks!

 

[soothsayer]

Light travels fastest when there is no medium (vacuum), so the less dense a material, the faster electromagnetic waves will travel. For sound waves, it is different, as sound requires a medium to travel through (as it is a compression wave) so as density increases, so does speed of sound waves through it. Sound is a mechanical wave, and all mechanical waves travel faster with density, to my knowledge.

 

[srikanthdeenu]

Hey Guys,

I was wondering which types of waves travel faster in optically dense materials and which waves travel slower in optically dense materials. Does light travel faster or slower and same with sound? Do all mechanical and electromagnetic waves follow these properties or does one follow one of the properties and the other one follows the other property?
Please answer these questions as soon as possible!
Thanks!

the lower friquency wave travel faster in opticaly dens meterial higher friquency waves traval slower in optically denser media the light travels faster or slower and also same with sound