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,
No comments:
Post a Comment