The nature and position of an image formed by a lens can be calculated from the lens formula.
Here p is the distance of object from the lens and q is the distance of image from the lens and f is the focal length of the lens.
a Here p is the distance of object from the lens and q is the distance of image from the lens and f is the focal length of the lens.
Let us consider an object OP whose real but inverted image is formed by a thin convex lens as shown in the figure:
It is clear from the figure that ∆OXP and ∆IXQ are similar then according to theorem of geometry,
Comparing equation(1) and (2),
Or,
This equation is known as the lens formula.
Or,
This equation is known as the lens formula.
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