Learn about and revise lenses and their power, real and virtual images, and ray diagrams with GCSE Bitesize Physics.

A plano-convex lens is compose of a plane and convex surfaces, has a positive focal length.It is used for the changing between point light source and parallel beam.It is mean when the light through ...

Lenses are used in cameras, telescopes, binoculars, microscopes and corrective glasses. A lens can be convex ... or concave.

Q.10.. A student conducts an experiment using a convex lens of focal length 20 cm and an object of height 15 cm. He placed the object at 25 cm from the lens. Can the image be formed on a screen?

The answer to this problem lies in the fact that the image formed by a convex lens becomes the virtual object for the mirror. For this to happen, rays after refraction will fall normally on the ...

Also, even though the image formed on the retina is inverted our mind interprets it as erect. So, the eye lens is the convex lens and the retina is the screen of the eye.