1. What type of waves is used on a TV remote control?
A infrared
B. microwaves
C. UV radiation
D. X-ray
2. Which electromagnetic wave is used in satellite communication?
A. infrared B. microwaves C. radio waves
D. visible light
3. In radio broadcasting, AM stands for
A. after morning
B. ante meridian
C. amplitude modelling
D. amplitude modulation
4. FM signals travel as changes in
A. the speed of the wave
B. the amplitude of the wave
C. the frequency of the wave
D. the loudness of the wave
5. On AM broadcasts, what remains constant?
A the amplitude B. the music C. the frequency D. the speech
6 Which type of electromagnetic wave is used in magnetic resonance imaging?
A X-ray
B. radio waves
C. microwaves D gamma rays