# Do electromagnetic waves not need a medium in which to travel?

Do electromagnetic waves not need a medium in which to travel? Electromagnetic waves are not like sound waves because they do not need molecules to travel. This means that electromagnetic waves can travel through air, solid objects and even space.

Why do electromagnetic waves not require a medium for travel quizlet? Why or why not? Light from the sun and stars could not travel through space to the Earth if light was a mechanical wave. Outer space is a vacuum so there is no medium for a mechanical wave to travel through. Electromagnetic radiation does not need a medium.

What electromagnetic waves require a medium to travel? Propagation of an Electromagnetic Wave

Mechanical waves, unlike electromagnetic waves, require the presence of a material medium in order to transport their energy from one location to another. Sound waves are examples of mechanical waves while light waves are examples of electromagnetic waves.

Why do electromagnetic waves travel at the speed of light? In short, EM waves travel at the speed of light because c≡1√μ0ε0. This quantity comes from the wave equation found by combining Faraday’s Law of Induction and Ampere’s Circuital Law.

## Do electromagnetic waves not need a medium in which to travel? – Additional Questions

### What happens to an electromagnetic wave when it travels from one medium to another?

When electromagnetic waves pass from one media to another, their velocity changes. The velocity, however remains constant within each medium. Hence, there must be some sort of interaction between the EM wave and the media at the interface that causes the EM waves to either accelerate or decelerate.

### Do microwaves require a medium?

Microwaves, like other forms of electromagnetic radiation, can propagate through space (i.e. they don’t require a medium like air or water to travel through).

### Do Rays need medium to travel?

An electromagnetic wave can travel through anything – be it air, a solid material or vacuum. It does not need a medium to propagate or travel from one place to another.