Physics 0625 · IGCSE · Electromagnetic spectrum

Electromagnetic spectrum — practice question

What speed do microwaves travel at in air?

  • A$3 \times 10^8\,\mu\text{m s}^{-1}$
  • B$3 \times 10^8\,\text{cm s}^{-1}$
  • C$3 \times 10^8\,\text{m s}^{-1}$
  • D$3 \times 10^8\,\text{km s}^{-1}$

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