Solve this:

​Q42. (i) A ray PQ of light is incident on the face AB of a glass prism ABC (as shown in the figure ) and emerges out of the face AC. Trace the path of the ray. Show that 
                     i + ​ e = ​ A + ​ δ  
        where, ​ δ  and e denote the angle of deviation and angle of emergence, respectively.
                   
      Plot a graph showing the variation of the angle of deviation as a function of angle of incidence. State the condition under which ​ δ is minimum.

Dear Student,

i.


ii.

Regards

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