Why is the index of refraction always greater than or equal to 1?
Step 1 of 3
Index of refraction of material can be defined as
Here, n, c, v is respectively, refractive index of the medium in which light travels, speed of light in the medium and speed of light in vacuum.
Since speed of light is maximum in vacuum and always less than c in any other medium/material, therefore from equation of refractive index value of index of refraction of any medium is equal to or greater than 1.
Textbook: College Physics
Author: Paul Peter Urone, Roger Hinrichs
This textbook survival guide was created for the textbook: College Physics , edition: 1. Since the solution to 3CQ from 25 chapter was answered, more than 459 students have viewed the full step-by-step answer. The answer to “Why is the index of refraction always greater than or equal to 1?” is broken down into a number of easy to follow steps, and 13 words. The full step-by-step solution to problem: 3CQ from chapter: 25 was answered by , our top Physics solution expert on 07/07/17, 04:39PM. This full solution covers the following key subjects: always, equal, Greater, index, refraction. This expansive textbook survival guide covers 34 chapters, and 3125 solutions. College Physics was written by and is associated to the ISBN: 9781938168000.