Radio waves travel faster. Infrared waves travel faster. They both travel at the same speed. The wave speed varies with their frequency.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: How does the speed of radio waves compare with the speed of infrared waves?
Possibilities:
- Radio waves travel faster.
- Infrared waves travel faster.
- They both travel at the same speed.
- The wave speed varies with their frequency.

They both travel at the same speed.