you are providing with two convex lens of same aperture and different thickness which one of them will be of shorter focal length
sizaB:
the lens which is more thick.
Answers
Answered by
3
We can answer this question by using lens maker’s formula.
For clarity, we shall consider same value , R for radius of curvature for both surfaces of a lens.
For less thick lens we take R=R1
For more thick lens R=R2.
It is clear that R2<R1.
Now,
(1/f1)=(n-1)[(1/R1)-(-1/R1)=(n-1)(2/R1) or
f1=R1/[2(n-1)]……………………(1) (less thick lens).
f2=R2/[2(n-1)]…………………..(2). (more thick lens.)
Since R1>R2, we have,f1>f2.
Hence, more thick lens is of shorter focal length.
Answered by
2
the convex lens having more thickness will have shorter focal length.
Similar questions