Question

18. An optical device forms an erect image of an object placed in front of it. If the size of the image is one half that of the object, the optical device is a : (a) Concave mirror (b) Convex mirror (c) Plane mirror (d) Convex lens​

Answer 1

Answer:

convex lens is the answer.

Answer 2

An optical device forms an erect image of an object placed in front of it. If the size of the image is one-half that of the object, the optical device is a:(b)Convex mirror.

• Curved mirror when the surface after reflection bulges outside towards the source of light is said to be a convex mirror.
• The image of a convex mirror can be formed when the position of an object is: between pole and infinity and at infinity.
• The images formed from the convex mirror are erect or upright, diminished, and virtual.
• Some of the uses of convex mirrors are in the looking glass of a car, in the passageway of hospitals, schools.