Name any four food items (including two fruits) which are rich in vitamin A.

Name the part of the eye

(a) Which controls the amount of light entering the eye.

(b) Which converges light rays to form the image.

Name the cells on the retina of an eye

(a) Which are sensitive to bright light.

(b) Which are sensitive to dim light.

What is the value of the speed of light?

If two plane mirrors make an angle of 60°, how many images will you find?