The simplest answer is that light consists of particles with wave properties. Elementary particles also have wave properties. This is how light travels.
how can we say light does not need light to travel
Light will not travel into silver.
Light can travel in a vacuum or in any transparent material
There is no way to travel at the speed of light.
As far as light can travel
Copper is opaque to light - light can not travel though it.
Light Rays travel in straight paths as transverse waves. It needs no medium to travel along.
no if an object is OPAQUE then light can't travel through it (unless it has a hole in it)
Light does travel through a vacuum.
it cant travel through light.
No. Nothing with mass can travel at the speed of light.
Light will not travel through an opaque sponge.