Question

Why can we assume that radio waves travel through air at the same speed as light?

Answer 1

Both radio waves and light are electromagnetic (EM) waves.

Explanation:

All EM waves should travel at the same speed in the same medium. The difference is in their wavelengths or frequencies.

`v=f lambda`, where v is the same for both radio waves and visible light.

The speed of these EM waves only changes when the medium changes. In vacuum, EM waves travel at their maximum speed of approximately `3.00 * 10^8 m/s`. In air, this speed is slightly lower but very close to the above value.