The Purpose is to measure the focal length of a convex lens, to verify the lens equation with the aid of the convex lens, and to measure the focal length of a concave lens.

Here are descriptions of each Mirror and Lens:

Concave Mirrors:

A concave mirror bends in towards the center like the inside of a bowl and a convex mirror bends outward to the edges.

Light rays are reflected inwards toward a focal point by concave mirrors. A concave mirror can produce images that are right side up and very large or upside down.

Concave Lenses:

A concave lens is thicker at the edges than it is at the center, and a convex lens is thicker in the middle than it is at its edges.

They reflect light rays outwards and the image that passes through a concave lens will always be right side up.

Convex Mirrors:

Images will appear right side up and smaller than the actual object.

Light rays are reflected outwards by a convex mirror. Images produced by a convex mirror will always appear right side up and smaller than the actual object.

Convex Lenses:

Convex Lenses refracts parallel light rays so they come together at a single point.

Image can be seen without actually looking through the lens. This is known as a real image.

Focal Point and Length:

F is a variable for Focal Length. Focal Length is the distance from the lens to the point where light rays incident on the lens come to a focus.

The point where the light rays meet a focus is called the focal point.