Refractive Index

CONTENTS Sl. No
Item
Page No.

1.
Objective

2.
Introduction

3.
Apparatus

4.
Theory

5.
Procedure

6.
Observations

7.
Diagrams

8.
Calculations + Graphs

9.
Precautions

10.
Bibliography

OBJECTIVES:


 To study the variation of the angle of deviation with the angle of incidence using Hollow Glass Prism and to determine the angle of minimum deviation.

 To find out the refractive index of various liquids using a Hollow Prism.

INTRODUCTION: This project is of Investigatory Type. In this project, a hollow prism has been used to calculate the refractive index of various liquids. The hollow prism is filled with liquid and then the experiment is performed.

APPARATUS:

 Drawing Board
 Sheet of Paper
 Hollow Glass Prism
 Graph Paper
 Protractor
 Drawing Pins
 All Pins
 Pencil

THEORY:

Refraction:

In a homogenous medium, light travels along a straight line, but whenever it falls on a surface of another medium, a very small fraction of it is reflected back and most of the light passes into the medium, though with a change of direction. This phenomenon of the bending of light at the surface of separation of the two medium is called refraction of light.

Causes of refraction:

This phenomenon of refraction takes place when a beam of light enters a medium in which light enters a medium in which light travels with a different velocity.

Laws Of Refraction:

1. The incident ray, the refracted and the normal to the surface at the point of incidence lie on the same plane.
2. For any two given media, the ratio of the sine of the angle of incidence to the angle of refraction is a constant,