The image formed by a lens is always virtual, erect and smaller in size for an object kept at different positions in front of it. Identify the nature of the lens.

You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from

An image formed by a lens is erect. Such an image could be formed by a

Fill in the blanks:

(a) The inner surface of a steel spoon acts as a __________ mirror.

(b) The outer surface of a flat steel plate acts as a ___________ mirror.

(c) The outer shining surface of a round bottom steel bowl acts as a __________ mirror.

(d) The inner surface of the reflector of a torch acts as a __________ mirror.

State whether the following statements are True or False.

(a) A concave lens can be used to produce an enlarged and erect image.

(b) A convex lens always produces a real image.

(c) The sides of an object and its image formed by a concave mirror are always interchanged.

(d) An object can be seen only if it emits light.