Answer the following:

Mention any four devices that contain a convex lens.

Convex lens are used in many days to day use devices below are some of them.

1. Magnifying Glass = Magnifying glass is a convex lens which produces a magnified and erect image of the object when an object is kept between the pole and the focus. The figure below shows the magnifying glass.

2. Camera = Convex lens is used in the camera lens to focus the light for a clean picture of an object. The figure below shows the camera lens.

3. Telescope = In a telescope the convex lens are used to collect the light coming from infinity and form its clear image at the focus. The figure below shows the telescope.

4. Microscope = Convex lens is used in the microscope because they are converging lens and focuses all the light at a specific point, and forms magnified the image of an object.