Lesson: Chapter 5 — Optics

5.3.1. The laws of refraction 4 of 5 Reset answers

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Question 4

What is the unit of refractive index?

A It has no unit B Degrees C Metres D m s^-1

The right answer is the one marked above.

It has no unit. It is a ratio of two sines, and sines have no unit.

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