Physics 9702 · AS & A Level · Electromagnetic spectrum

Electromagnetic spectrum — practice question

An electromagnetic wave has a period of $1.0\,\text{ns}$. What are its frequency and wavelength?

  • Afrequency $= 1.0\,\text{Hz}$, wavelength $= 3.0 \times 10^8\,\text{m}$
  • Bfrequency $= 1.0 \times 10^6\,\text{Hz}$, wavelength $= 300\,\text{m}$
  • Cfrequency $= 1.0 \times 10^9\,\text{Hz}$, wavelength $= 0.30\,\text{m}$
  • Dfrequency $= 1.0 \times 10^{12}\,\text{Hz}$, wavelength $= 3.0 \times 10^{-4}\,\text{m}$

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