Question

What must be the distance between an object and a converging lens of focal length 20cm to produce an erect image two times the object height?

Answer 1

Answer:

- 10 cm ( Negative sign indicates the back of the lens )

Explanation:

Here, we will use :-

• Lens Formula
• The property of Convex lens of forming a virtual and erect image when object is placed closer to the lens than the focal point .
• Magnification formula