Quiz 8
Section:
Phys 222, Fall 2014
Name:
Problem 1.(2 points.) For thin lens, fill in the blanks
A) Real Image ⇐⇒.................. image ⇐⇒ xi is ..............
B) Virtual Image ⇐⇒................... image ⇐⇒ xi is ..............
Choices:- Negative, Positive, Upright, Inverted
Problem 2.(1.5 points.) ............................... lenses are used to correct myopic (nearsighted) eyes and ............................... lenses are used to correct hyperopic (farsighted)
eyes.
Problem 3.(1.5 points.) Which of the following statements is true concerning a magnifying glass?
A) It can be made from a diverging lens.
B) The object must be placed outside the focal point of the lens.
C) It produces a virtual image
D) The image distance will be less than the object distance.
E) It produces an inverted image.
Extra Credit.(1 points.) When certain light rays pass from a vacuum into a block of
an unknown material, the measured index of refraction of the material is 2. What is
the speed of light inside the block?