In a vacuum, light always travels at the same speed, about 300 000 kilometers per second.
Light does travel through a vacuum.
When light travels through anything that is not a vacuum, it will usually slow down.
No. Only light waves can travel through a vacuum.
Light can travel through vacuum, but it is not a medium.
light can travel through a vacuum whereas sound cant
No. Light is an example of an electromagnetic wave, which can travel through a vacuum. Mechanical waves must travel through a medium, and cannot travel through a vacuum.
No, light is at its fastest in a vacuum.
You create a vacuum in a lab, and then shine a light through it, and there is experimental proof that light travels through a vacuum. Alternatively, take the fact that light travels through space - if light could not travel through a vacuum, no light from the stars, the moon or the sun would ever reach our planet.
Light travels fastest through vacuum.
it travels at c (speed of light in a vacuum)
Why not? Of course it can!
A vacuum.