Question

Mechanical (sound) waves are unable to travel through a vacuum, such as through space, but radio waves are transmitted to Earth from satellites. How is this possible?

Answer 1

well sound needs a medium to travel whereas radio waves are transmitted in the form of electromagnetic waves which requires no medium.

Answer 2

Reason why the mechanical Waves cannot travel through the vacuum

Explanation

The mechanical waves such as sound do not travel through vacuum, but radio waves does travel through because they are electromagnetic waves.

As we know that the sound waves are basically mechanical waves and so they are unable to travel in vacuum, like the space. But the radio waves are being transmitted through satellites to Earth. This is because of the fact that the radio waves possess the property of electric field as well as magnetic field, i.e. they are electromagnetically charged wave particles.