Author Question: It is desired to project the image of an object four times its actual size using a lens of focal ... (Read 137 times)

Shelles · **on:** Jul 29, 2018

It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm. How far from the lens should the object be placed?

A) 100 cm
B) 80 cm
C) 4.0 cm
D) 25 cm
E) 5.0 cm

Question 2

A fisherman in a stream 39 cm deep looks downward into the water and sees a rock on the stream bed. How deep does the stream appear to the fisherman? The index of refraction of the water is 1.33.

A) 29 cm
B) 52 cm
C) 33 cm
D) 45 cm