Question

For performing an experiment, a student was asked to choose one concave mirror and one convex lens from a lot of mirrors and lenses of different kinds. the correct procedure adopted by her will be:
(1) To choose a mirror and lens which can form an enlarged and erect image of an object.
(2) To choose a mirror which can form a diminished and erect image and a lens which can form an enlarged and erect image of the object.
(3) To choose a mirror which can form an enlarged and erect image and a lens which can form a diminished and erect image of an object.
(4) To choose a mirror and a lens which can form a diminished and erect image of an object.

Answer 1

When a concave mirror forms a diminished image, it's always inverted. When it forms an erect image, it's always enlarged. A convex lens also forms an enlarged erect image. So, both the concave mirror and the convex lens can form an erect and an enlarged image of the object.

That's why, to have one concave mirror and one convex lens, the student should choose a mirror and a lens which can form an enlarged and erect image of the object.

Hence, the correct answer is option 1.