Question

Identify the condition which will form enlarged, virtual and erect image.

• A. convex lens, object placed between F and 2F_.
• B. convex lens, object placed beyond 2F
• C. convex lens, object placed between F and optical centre O.
• D. concave mirror, object placed beyond centre of curvature.

Answer 1

The correct option is C

convex lens, object placed between F and optical centre O.

When the object is placed between focus and principal axis, an enlarged image of the object is always formed on the same side. The first ray of light is parallel to the principal axis and, therefore, passes through the focal point. The second ray of light goes from the top of the object and passes straight through the centre of the lens.