Which travels fastest through dense matter?

A.
telemetry waves

B.
ultraviolet waves

C.
sound waves

D.
radio waves

Question

Which travels fastest through dense matter?	
 
 A.
telemetry waves
 
 B.
ultraviolet waves
 
 C.
sound waves
 
 D.
radio waves

anonymous · Answer

ultraviolet will not pass through dense matter, radio does, sound travels at most at 600[m/s], telemetry uses radio waves (afaik),   so i would say radio waves (not certain though)

anonymous · Answer

thats what i thought but apparently it is sound waves

anonymous · Answer

thx anyways

theeric · Answer

Sound waves use matter as a medium, where as dense materials tend to absorb light, I think. I wouldn't be able to answer this, but that might have something to do with it.

anonymous · Answer

thx

theeric · Answer

Np!

anonymous · Answer

johnlin1  the newton/laplace equation says that the velocity of sound is given by:$$V=\sqrt{\frac{ K }{ \rho }}; \ \ \ p=density; \ \ \ K=elastic\ modulus$$
so it is really counter intuitive what you are saying, since the vel. of sound is inversely proportional to density of matter... i'd like someone to explain this to me :)

theeric · Answer

I'm no expert in this, but the speed of light also decreases through different mediums, and the energy is absorbed. The EM radiation speed of propagation can be described by the index of refraction of a material, I think.