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The electromagnetic spectrum

The electromagnetic spectrum

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Question 9

An instrumentation laboratory uses four different electromagnetic radiation sources for calibration:

  • Source P: A microwave transmitter operating at a frequency of 12 GHz12\text{ GHz}12 GHz
  • Source Q: An infrared laser with a wavelength of 1.5 μm1.5\ \mu\text{m}1.5 μm
  • Source R: A terahertz sensor operating at a frequency of 2.5 THz2.5\text{ THz}2.5 THz
  • Source S: A violet LED with a wavelength of 405 nm405\text{ nm}405 nm

Which of the following correctly lists these sources in order of increasing frequency?

A

P, R, Q, S

B

S, Q, R, P

C

P, S, R, Q

D

R, P, Q, S

Markscheme

The electromagnetic spectrum Questions

  1. IGCSE
  2. /Physics
  3. /The electromagnetic spectrum

28 exam-style questions on Edexcel IGCSE Physics The electromagnetic spectrum. Each one has a worked solution and a mark scheme showing where the marks go.

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