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for a convex lens 1/v+1/u=1/f .  how u would determine focal length graphicallyfor a convex lens 1/v+1/u=1/f .  how u would determine focal length graphicallyU

Rishabh chaurasia , 14 Years ago
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Askiitians Expert Soumyajit IIT-Kharagpur

Last Activity: 14 Years ago

Dear Rishabh,

Ans:- As for a particular lens, the focal length is fixed hence f is fixed and hence 1/f is also fixed.

So, lets take 1/v=x and 1/u=y So, in the experiment take various object and image distances and plot their inverse in the graph paper.

So we shall get, a st line x+y=k where K =1/f. Now transfer it is the form of x/k + y/k=1 from the plotted st line and it,s intercept we can find out the value of k and then find out

it's inverse which will give the value of the focal length 

 

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All the best Rishabh!!!

 


Regards,

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SOUMYAJIT IIT_KHARAGPUR

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