Physics 0625 · IGCSE · Light

Light — practice question

Light moves through a material at $50\%$ of its speed in air. What is the refractive index of this material?

  • A$0.5$
  • B$2.0$
  • C$6.0 \times 10^{8}$
  • D$1.5 \times 10^{8}$

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