Which of the following is true about the frequencies of electromagnetic radiation

A. Ultraviolet waves have higher frequencies than radio waves.

B. X-rays have lower frequencies than infrared waves.

C. Radio waves have higher frequency than x-rays.

D. Gamma rays have lower frequencies than ultraviolet waves.

Answer:Ultraviolet waves have higher frequencies than radio waves.

Explanation:

The waves arranged in increasing order of frequency are radio waves, infrared waves, x-rays, ultraviolet waves.

Option A:

Ultraviolet waves have higher frequencies than radio waves. This agrees with the above order.

Option B:

X-rays have lower frequencies than infrared waves. This does not agree with the above order.

Option C:

Radio waves have higher frequency than x-rays. This does not agree with the above order.

Option D:

Gamma rays have lower frequencies than ultraviolet waves. This does not agree with the above order.

So, option A is correct.