Which of the following statements indicates that light waves are transverse?
Light waves can be polarized.
Correct Option: Option C
Incorrect Options
Option A
Light waves can travel through vacuum, but it does not show that they are transverse in nature. This is due to the fact that all transverse waves cannot travel through vacuum; only electromagnetic waves can. So, this option is incorrect.
Option B
The phenomenon of superposition of two or more waves that results in a wave with an amplitude that is either larger or smaller than the two waves is called interference. The interference of light shows the wave nature of light and does not describe further what kind of wave it is. So, this option is incorrect.
Option D
Diffraction of a wave is the process of bending the wave due to an obstacle. The diffraction of light shows the wave nature of light and does not describe further what kind of wave it is. So, this option is incorrect.
Hence, option C is correct.