CBSE Class 10 Physics Lens Formulae


A convex lens of focal length 20 cm is placed at a distance of 10 cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?


If the magnification produced is +0.5, then the nature of the image is ________ and the nature of the lens is ____________.

Magnification of a Microscope

Define New Cartesian Sign convention, object/image distance, lens formula, magnification, power and combined focal length of thin spherical lenses.