Waves the electromagnetic spectrum
4 marks · NormalThe diagram below represents the electromagnetic spectrum, but some wave types are missing.
| Wave type | Relative position (increasing frequency) |
|---|---|
| Radio waves | 1 |
| - | 2 |
| Visible light | 3 |
| - | 4 |
| Gamma rays | 5 |
Name the wave type that should be in position 2.
Name the wave type that should be in position 4.
State whether the wavelength of the wave in position 2 is longer or shorter than that of visible light.
State one use of the wave type in position 4.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) Microwaves · must show Microwaves
(b) Ultraviolet · must show Ultraviolet
(c) Longer · must show Longer
(d) Sterilising equipment (or tanning, or security marking) · must show Any valid use such as sterilising, tanning, detecting forged banknotes, security marking
Must show: a: Correct wave (Microwaves or Infrared), b: Correct wave (Ultraviolet or X-rays, depending on context), c: Correct comparison of wavelength, d: Suitable use
Common mistakes: Reversing position 2 and 4; Incorrect use for the wave
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Marking points
B1 (a) · 1 mark · States Microwaves for position 2.
B2 (b) · 1 mark · States Ultraviolet for position 4.
B3 (c) · 1 mark · States wavelength is longer than visible light.
B4 (d) · 1 mark · States a correct use of ultraviolet radiation.
Worked solution
a) Microwaves b) Ultraviolet c) Longer d) Sterilising equipment