Draw a ray diagram to show a myopic eye.

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 right angled isosceles prism may be used to ''bend the path of light rays by 90^(@) . Write the necessary condition in terms of the refractive index of the material of this prism for the ray to bend to 90^(@) .

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

Draw a ray diagram to show the path of a ray of light passing obliquely from water to alcohol.

(i) A ray of white light breaks up into its components while passing through a glass prism. Draw a ray diagram to show the path of rays. (ii) Mark the least deviated colour in your diagram. (iii) Why do different coloured rays deviate differently in a prism ?