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Physics · Oct / Nov 2020 · Paper 12 · Question 25

5054Electromagnetic spectrum

Applications use different components of the electromagnetic spectrum. Which shows correct applications for X-rays, ultraviolet light and microwaves?

  1. Amobile phone | fluorescent tube | intruder alarm
  2. Bkilling cancerous cells | sterilising surgical instruments | satellite television
  3. Cmedical imaging | television controller | sunbed
  4. Dsterilising surgical instruments | television controller | detecting cracks in metal

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Correct answer: B. killing cancerous cells | sterilising surgical instruments | satellite television

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