- #1
ben488
- 2
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If I have a converging lens, of focal length f, and magnification of the image m, where q is the distance of the image from the lens show that q = (1+m) f
m = - q/p
1/f = 1/p + 1/q
I just need to show that they are equal, but I am getting confused with the maths..
q= (1 - (q/p)) (1/(1/p + 1/q))
q= (1 - (q/p))(qp/(p+q)
q= (qp/p + q) - (q/p)(qp/(p+ q)
m = - q/p
1/f = 1/p + 1/q
I just need to show that they are equal, but I am getting confused with the maths..
q= (1 - (q/p)) (1/(1/p + 1/q))
q= (1 - (q/p))(qp/(p+q)
q= (qp/p + q) - (q/p)(qp/(p+ q)