Question

where should an object be placed to obtain its image has real and of some size has the object by convex lens.
A) At F1
B) At 2F1
C) between F1 and 2F1
D) between O and F1​

Answer 1

Answer:

An infinitely large, real and inverted image is formed at infinity when object is placed at principal focus, F1 of a convex lens.

Answer 2

Answer:

B) At 2F1

Explanation:

The required diagram is shown in the figure. When an object is placed in front of the convex lens, i.e., between 2F1

and F1

, its image is formed beyond 2F2

on the other side of the lens. The image is real, inverted and enlarged.