1. REFRACTING
INDEX OF PRISM
USING SNELLS LAW AND ANGLE OF PRISM FORMULA

2. AIM
Using pins with a given prism determine the angles
of deviation for different values of angle of
incidence. Draw the graph of angle of deviation
versus angle of incidence. Determine, from this
the angle of minimum deviation and determine
refractive index of material of the prism.

3. DISPERSION OF LIGHT IN PRISM

4. MOTIVATION
BEHIND THE EXPERIMENT
 Scientist wanted to quantify the factor by which
light deviated
 Physical measurable quantities are angle of
incidence, angle of refraction and angle of prism
 Scientist derived a simple formula relating the
unknown factor with measurable quantities

5. PROCEDURE

6. PROCEDURE

7. PROCEDURE

8. PROCEDURE
D
i
r

9. CALULATION
 Calculating the values of angle of incidence and
emergence we get the angle of deviation
D= I + E – A
 Using the minimum deviation formula we can
calculate the refractive index of the prism

10. THANK YOU