gold, that is why they use it for computer connections, also gold does not corrode
They travel through a material medium.
Spongy materials are the most difficult for sound to travel through. Vacuum is the best acoustic insulation but it doesn't really count for the purpose of this question, since it is not a material but a lack of material.
Sound waves travel through a material by causing particles in the material to vibrate back and forth in the direction of the wave. The disturbance created by these vibrations passes from one particle to the next, transmitting the sound energy through the material. The speed of sound in a material depends on the density and elasticity of the material.
it cant travel through light.
gold, that is why they use it for computer connections, also gold does not corrode
Sound and Light can travel through space.
The material through which waves travel is called a medium. This could be a solid, liquid, or gas.
Sound (and vibration) are a wave system of sequential compressions and rarefactions of a material. These waves are mechanical and do need a substance through which to travel. They cannot travel through a vacuum.
An opaqe object. NO light can travel through it at all.
Light can travel through transparent and translucent glass.
medium
Sound can travel through all matter. The speed at which it travels depends on the density of the material.