Name two factors on which the focal length of a lens depends.

Draw the given diagram in your answer book and complete it for the path of a ray of light after passing through the lens.

What type of lens would you use as a magnifying glass? How close must the object be to the lens?

State any two uses of convex lenses.

Fill in the following blanks with suitable words:

(a) _______ rays of light are refracted by a convex lens to a point called the focus.

(b) The image in a convex lens depends upon the distance of the object from the______.