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Q: A light ray enters from medium A to medium B, and as a result, it bends away from the normal in the medium B. The refractive index of medium B relative to medium A is:
  • A. greater than unity
  • B. equal to unity
  • C. less than unity
  • D. equal to 2
Correct Answer: Option C - A light ray enters from medium A to medium B, and as a result it bends away from the normal in the medium B, the refractive index a of medium relative to medium is less than unity. Because the refractive index of a rarer medium is less than that of denser medium.
C. A light ray enters from medium A to medium B, and as a result it bends away from the normal in the medium B, the refractive index a of medium relative to medium is less than unity. Because the refractive index of a rarer medium is less than that of denser medium.

Explanations:

A light ray enters from medium A to medium B, and as a result it bends away from the normal in the medium B, the refractive index a of medium relative to medium is less than unity. Because the refractive index of a rarer medium is less than that of denser medium.