1. Which one of the following types of electromagnetic wave is used to carry information between masts in a mobile phone network?
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Other questions in this quiz
2. What is the big bang theory?
- The theory that the universe is expanding after an explosion form an initial point
- When a balloon makes a large bang
- The theory that matter leaked into the universe
- i dont know
3. Visible light can:
- Cause blindness
- cause cancer
- damage skin cells and cause burns
- internal tissue heating
4. The atmosphere ____ radio waves that carry signals from local radio stations. This is why the signals cannot be received far away from the transmitter
5. What direction is the red shift?