No. It is radiation, not vibration. As electromagnetic energy, it can travel through a vacuum, and only through transparent or translucent material.
No, it does not. It can travel through any open space. Sound, unlike light, needs a medium to travel. So light can travel through outer space but sound cannot because there is no medium.
a light wave?
how can we say light does not need light to travel
False, mechanical waves need a medium to travel through. Electromagnetic waves, such as visible light, don't.
No, only surface and mechanical waves need a medium, compressional waves can travel through space. (Such as light from the Sun).I think light (EM) waves are the only ones that can travel through a vacuum. Sound waves require a medium.
Mechanical waves need a medium substance to travel through. Electromagnetic do not.
Because they don't need any material substance to travel through in order to get from place to place.
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.
If light rays did not travel through space there would be no way for them to reach Earth.
No, it does not. It can travel through any open space. Sound, unlike light, needs a medium to travel. So light can travel through outer space but sound cannot because there is no medium.
Radiation is like light, it can travel through empty space. The "why" is a bit complex; basically, light, as well as similar radiations (including heat radiation) consists of electromagnetic waves. These can travel through empty space, since they are just waves in the electric and magnetic properties of space.
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.
a light wave?
Yes, mechanical waves do need a medium in order to travel. Other waves, such as light, do not (thus they can travel through space).
Yes. Light is a self-propagating wave that does not need a medium to flow. Thus, light has the ability to travel through a vacuum.
Light waves do not need a medium to propagate. Sound waves cannot travel without a medium. Light waves always travel at the speed of light that is 3*108m/s.
how can we say light does not need light to travel