Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Refraction Of Light:- When a ray of light travels obliquely from one transparent medium to another, its velocity changes, due to which it gets deviated from its original direction at the surface separating the two media. This phenomenon is called refraction of light.

Refractive Index:-

1. Absolute Refractive Index:- The ratio of velocity of light in vacuum to the velocity of light in given medium is called absolute refractive index of that medium. It is denoted by η (Greek letter eta)

So η=c/v

2. Relative Refractive Index:- The ratio of velocity of light in medium 1 to the velocity of light in medium 2 is known as relative refractive index of medium 2 with respect to medium 1. It is denoted by η₂₁.

So  η₂₁=v₁/v₂

0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts