Question

Why can light travel in vacuum ?

Answer 1

Electromagnetic wave

1. They are waves created as a result of vibrations of the electric and magnetic fields. i.e., they are oscillating electric and magnetic fields.
2. Radio waves, microwaves, visible lights, and x-rays are all examples of electromagnetic waves.
3. They do not require a medium for their propagation.
4. Light is also an electromagnetic wave.

Since electromagnetic waves do not require a medium for their propagation and since light is an electromagnetic wave, light can travel in vacuum.