SOUND NEEDS A MEDIUM TO TRAVEL

Sound travels in air if :

Statement 1 : Light can travel through vacuum Statement II : Light needs a medium to travel.

Figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is

Does sound need a medium to travel? Describe an activity to show that sound is a mechanical wave and need a material medium for its propagation.

Sound needs a ___________ to travel.

Sound travels much _____ than light in a given medium.