A 14-mm tall postage stamp is 4.0 mm from a converging lens. If the image of the stamp is 4.0 mm tall, how far is it from the lens?
A) 14 mm
B) 8.7 mm
C) 1.4 mm
D) 1.1 mm
Question 2
A seed is 15 mm in front of a converging lens, and the image of the seed is 4.0 mm behind the lens. What is the focal length of the lens?
A) 11 mm
B) 5.5 mm
C) 3.8 mm
D) 3.2 mm