Question

Which of the following lenses or mirrors can be used to produce a image of the same size? Question 13 options: concave mirror convex lens convex mirror concave lens flat mirror.

Answer 1

a) Concave mirror can form same size image. This happens when object is kept at centre of curvature. The image is formed at the object itself and of same size.

b) Convex lens can form same size image. This happens when the object is placed at a distance 2f from the lens. The image is formed at a distance 2f on the other side of the lens and is of same size as the object.

c) Convex mirror cannot form same size image of a real object.

d) Concave mirror cannot form same size image of a real object.

e) Flat mirror always forms same size image of the object.