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Question 17

This question is about waves in the electromagnetic spectrum.

a.

The diagram below shows the regions of the electromagnetic spectrum ordered from shortest wavelength to longest wavelength, with two regions labeled A and B currently missing.

gamma raysAultravioletvisible lightBmicrowavesradio waves \begin{array}{|c|c|c|c|c|c|c|} \hline \text{gamma rays} & \text{A} & \text{ultraviolet} & \text{visible light} & \text{B} & \text{microwaves} & \text{radio waves} \\ \hline \end{array} gamma rays​A​ultraviolet​visible light​B​microwaves​radio waves​​

Identify the missing regions A and B.

[2]
b.

Which electromagnetic radiation is used for medical imaging of bones and security baggage scanners?

  • A ultraviolet
  • B microwaves
  • C X-rays
  • D gamma rays
[1]
c.

Which electromagnetic radiation is used for terrestrial television transmissions and radio broadcasting?

  • A radio waves
  • B microwaves
  • C infrared
  • D visible light
[1]
d.

The list of electromagnetic waves ordered from gamma rays to radio waves is in order of:

  • A increasing frequency
  • B decreasing wavelength
  • C decreasing speed in a vacuum
  • D increasing wavelength
[1]
e.

Excessive exposure to certain types of electromagnetic radiation can be hazardous to human health.

For two different types of electromagnetic radiation, describe:

  • a harmful effect on the human body,
  • how the risk of exposure can be reduced.
[4]
Markscheme

Waves Questions

  1. IGCSE
  2. /Physics
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