Physics 9702 · AS & A Level · Electromagnetic spectrum

Electromagnetic spectrum — practice question

Radio waves may be used to find the separation between Earth and the planet Jupiter. A pulse of radio waves is sent out from the surface of Earth. The pulse is reflected by the surface of Jupiter and then received back on Earth. The interval between transmission and reception of the pulse is $3960\,\text{s}$. What is the distance between Earth and Jupiter?

  • A$5.94 \times 10^8\,\text{km}$
  • B$1.19 \times 10^9\,\text{km}$
  • C$5.94 \times 10^{11}\,\text{km}$
  • D$1.19 \times 10^{12}\,\text{km}$

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