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? A) Radio waves are electromagnetic waves. B) Satellites are located within our atmosphere. C) Radio waves are very high energy mechanical waves. D) Radio waves are changed to gamma rays for transmission

Answer 1

Your answer is "A" (radio waves are electromagnetic waves)

Answer 2

The correct answer of this question is Option A.

Sound is actually the physical vibration which travels through different types of medium, that's why it cannot travel through the vacuum space due to the lack of propagation medium.

But radio waves of the satellites are basically electromagnetic waves which don't need any sort of propagation medium, that's why it can travel through the vacuum space.