IG Phy – Convex Lens

A converging lens is also known as a convex lens.

The principal focus of a convex lens is the point where parallel light rays converge.

The distance between the principal focus and the center of the lens is called the focal length.

Converging lenses are used to form images by magnifying glasses, cameras, and microscopes.

In ray diagrams, a standard ray through the center of the lens does not bend.

A real image formed by a convex lens can be projected onto a screen.

An object placed at a distance greater than twice the focal length from the lens forms a diminished, inverted image.

An object placed between the focal length and twice the focal length from the lens forms an upright image.

A virtual image formed by a convex lens is always upright.

To see a virtual image, you need to look through the lens.

A virtual image can be projected onto a screen.

In ray diagrams, any two standard rays can be used to determine the position and size of the image.

An object placed within the principal focus of a convex lens forms an enlarged, virtual image.

The principal axis is the line of symmetry passing through the center of the lens and the principal foci.

A standard ray parallel to the principal axis will pass through the principal focus after refraction by a convex lens.