What is the myopia (near sightedness) ? Draw a ray diagram to show how it can be corrected using a lens.

Draw a ray diagram to show a myopic eye.

Draw a diagram to show how hypermetropia is corrected.

What is hypermetropia (far-sightedness) ? What are its causes ? How can it be corrected ?

Draw a ray diagram to show image formation by a concave lens.

Given below is a diagram showing defect of human eye . Draw a labelled diagram to show how the defect is rectified by using the lens.

An object placed 4 cm in front of a converging lens produces a real image 12 cm from the lens. a) What is the magnification of the image? b) What is the focal length of the lens? Draw a ray diagram to show the formation of image. Mark clearly F and 2F in the diagram.