- #1

BrokenSoul

- 5

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## Homework Statement

How we can determine The diameter of the lens of the camera approximitly that this picture took with that?

( we know that lens of the camera made by some parts but we count them as a thin one in Practical calculations )

## Homework Equations

m = q / p 1/f = 1/q + 1/p f = f/p-f f : Focal length q = Distance between of the object and the lens

p = Distance between of the image and the lens m = Magnification

## The Attempt at a Solution

i tried to find lens Magnification by calculating the distance between every centimeter of the ruler and then find its Magnification ( m ) . after that i used this formula 1/f = 1/p + 1/q

so i got f Terms p now i don't know how i must find its diameter .