Physics 9702 · AS & A Level · Electromagnetic spectrum

Electromagnetic spectrum — practice question

The table gives possible orders of magnitude for the wavelengths of some of the main radiations in the electromagnetic spectrum. Which row gives the correct orders of magnitude for the wavelengths?

  • Amicrowaves $10^{-6}\,\text{m}$, infra-red $10^{-10}\,\text{m}$, ultraviolet $10^{-12}\,\text{m}$, X-rays $10^{-14}\,\text{m}$
  • Bmicrowaves $10^{-4}\,\text{m}$, infra-red $10^{-8}\,\text{m}$, ultraviolet $10^{-10}\,\text{m}$, X-rays $10^{-12}\,\text{m}$
  • Cmicrowaves $10^{-2}\,\text{m}$, infra-red $10^{-6}\,\text{m}$, ultraviolet $10^{-8}\,\text{m}$, X-rays $10^{-10}\,\text{m}$
  • Dmicrowaves $10^{2}\,\text{m}$, infra-red $10^{-4}\,\text{m}$, ultraviolet $10^{-6}\,\text{m}$, X-rays $10^{-8}\,\text{m}$

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