1 This question is about waves.
(a) (1) Which of these waves is longitudinal?
A infrared
3 B radio
WC sound
3 D ultraviolet
(ii) Draw a straight line linking each electromagnetic wave to its correct hazard.
Electromagnetic wave
Hazard
skin burns
microwave
blindness
3
(11) Which of these is a use for infrared waves?
(1)
A checting for broken bones
B cooking food
C detecting forged banknotes
D sterilising medical instruments
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Answer:
1. There are three basic kinds of waves. ... Radio waves, infrared, visible light, ultraviolet, x-rays and gamma rays are ... (b) How much time will it take for the sound (thunder) to reach you?
2. The diagram shows the electromagnetic spectrum. Radio waves. Microwaves. Infrared. Visible light Ultraviolet. X-rays. Gamma rays.
Explanation:
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