Which statement demonstrates that ultraviolet (UV) rays are electromagnetic waves?
A.
They require a medium to travel.
B.
They don’t require a medium to travel.
C.
The particles of the medium through which they travel vibrate perpendicularly to the direction of the wave.
D.
The particles of the medium through which they travel vibrate parallel to the direction of the wave.
E.
The particles in the medium through which they travel remain stationary.