Physics 0625 · IGCSE · Light

Light — practice question

The Moon is $380\,000\ \text{km}$ away from the Earth. A laser beam of light is sent from the Earth to the Moon. The beam is then reflected back to the Earth. How long does it take for the light to travel to the Moon and return to the Earth?

  • A$1.27\ \text{ms}$
  • B$2.53\ \text{ms}$
  • C$1.27\ \text{s}$
  • D$2.53\ \text{s}$

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