What speed does a wave that is radiated through "free space" travel?
A)Speed of light
B)Speed of sound
C)Actual velocity
D)Velocity of propagation

Question

Quizplus · Accepted Answer

The speed of a wave that is radiated through "free space" is the speed of light, which is approximately 3 x 10^8 meters per second. This is also commonly referred to as the velocity of propagation. Sound waves, on the other hand, require a medium to propagate and therefore cannot travel through empty space.

What Speed Does a Wave That Is Radiated Through "Free