Login / Register

List of top Physics Questions on spherical lenses

A convex lens has a focal length of \( 20 \, \text{cm} \). An object is placed at a distance of \( 30 \, \text{cm} \) from the lens. What is the position of the image formed?
A convex lens has a focal length of 10 cm. What is the magnification produced when the object is placed 30 cm from the lens?
What is the focal length of a lens if its power is +2 D?
A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm. The magnifying power of telescope for viewing a distant object is :