to determine angle of minimum deviation of a prism?

Question

actaully i have a practical exam on monday n i need d readings of this experiment "to determine angle of minimum deviation for a given prism by plotting a graph between angle of incidence and angle of deviation "
its a 12th class cbse physics practical............please help me :)

Answer 1

Hello Kitty, it is a practical session ya. You have to do the practical and get the readings on your own. Are you going to do the experiment using spectrometer or by tracing the lines on a paper fixed to a drawing board?

Answer 2

Yes the above answer is right, that link is alright, you will get the equation as well the graph plotting.

However, I would suggest this site http://www.askiitians.com/iit_jee-Ray_Optics/Prism

It treats it better than the above. There is a small error in the site given by me; the angle of emergence in the figure is given to be 'r' but in equations it is 'e'.



Minimum deviation comes out to be D = incident ray angle + emergent ray angle - A

(A = vertical angle of prism)



For minimum deviation, A + Dmin = 2i or, Dmin = 2i - A.

Answer 3

try:



http://ioannis.virtualcomposer2000.com/spectroscope/deviationangle.html