Question

 

28)

As you move an object from just outside to just inside the focal point of a converging lens, its image,

A) goes from real to virtual and from inverted to erect.

B) goes from inverted to erect, but remains real.

C) goes from inverted to erect, but remains virtual.

D) goes from real to virtual, but remains inverted.

 

29) A certain thin lens has a focal length f. If you double both its radii of curvature, but change nothing else, its focal length will now be,

A)4f B)2f C)f/2 D)f/4

Answer 1

Number 28)

Choice A

Number 29)

Choice B