Question

What do all electromagnetic waves have in common? They have the same amplitude. They have the same frequency. They have the same wavelength. They have the same speed.

Answer 1

Answer: The correct answer is that they have the same speed.

Explanation:

Electromagnetic waves are defined as the waves which are created by the vibrations between the electric and magnetic field. The two fields propagate perpendicularly to each other.

These waves have certain characteristics including amplitude, frequency and wavelength. So, it is different and characteristic for every electromagnetic waves.

These waves travel with the same speed of light in vacuum. Hence, the correct answer is that they have the same speed.

Answer 2

Different electromagnetic waves have vastly different amplitudes,
frequencies, and wavelengths.  But as long as they stay in the same
material medium, they all have very nearly the same speed.