Question

Like sound light also cannot travel in vacuum.
State whether the above statement is True / False.

Answer 1

Hint: Longitudinal waves that move across a medium such as air or water are known as sound waves. When we conceive about sound, we frequently consider its amplitude (or intensity) as well as its pitch (frequency). Because sound waves move by compressions and rarefactions, they require molecules that can travel over long distances, but light does not. It moves with the help of photons, which are hypothetical particles that do not need to be compressed.

Complete step by step answer:
When the air pressure oscillates at a certain location, the air particles are compressed and expanded in a series of steps. These oscillations reach our ears, where they transform the mechanical energy of the waves into electrical energy in the form of pulses that are sent to the brain. This is how we understand sound. As a result, sound waves require a medium to travel from one location to another. Sound waves cannot travel in vacuum because they lack a medium. Sound waves and light waves are not the same thing. Light waves are electromagnetic waves that move from one location to another without the use of a medium.
Electromagnetic waves are created by the rapid vibration of charged particles. Wave and matter characteristics exist in these longitudinal waves. As a result, they don't require a propagation medium. Light is an electromagnetic wave that does not need to be transmitted through a medium. Particle-wave duality is a characteristic of photons in light. As a result, they have the ability to act as both particles and waves. As a result, light does not need a medium to propagate. They have the ability to travel in a vacuum. Light travels in waves and, like sound, can be delayed by the medium through which it passes. In a vacuum, nothing can outrun light.
Hence the given statement Is False.

Note:
However, if an area includes any substance, including dust, light can bend as it comes into contact with the particles, slowing it down. Light travelling through Earth's atmosphere travels at about the same speed as light travelling through a vacuum, whereas light travelling through a diamond travels at less than half that speed. Even so, it passes through the diamond at a speed of about 277 million mph (almost 124,000 km/s) – hardly a slow speed.