in a convex lens, there are two focal points. So, in any given question, if 'f'=24cm. Then what does this mean, is F1= 24 (or) F2=24. answer this question
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f1 is the principal focus hence if f=24 then it means F1 = 24 cm
jaaishriraam1:
then, what about 'f' becoming grater than 'R'
f= r/2
no, it's r=f/2
thn radius of curvature is greater than focul length
r is greater than f
in spherical mirrors we have studied this relation(r=f/2)
yes u are right
so according to that r is always greater than f
okk
thanks
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