4. [5pt] What is the magnification of the object in the previous problem? Answer
ID: 1516770 • Letter: 4
Question
4. [5pt]
What is the magnification of the object in the previous problem?
Answer: Last Answer: 0.64
Incorrect, tries 2/20.
6. [5pt]
A 0.54 cm high object is placed 8.5 cm in front of a diverging lens whose focal length is -7.5 cm. What is the height of the image?
Answer: Last Answer: 0.64
Not yet correct, tries 0/20
A magnifying glass uses a converging lens with a focal length of 15.5 cm. It produces a virtual and upright image that is 3.1 times larger than the object.
7. [5pt]
How far is the object from the lens?
Answer:
8. [5pt]
What is the image distance?
Answer: Last Answer: DACACBE
Not yet correct, tries 2/20
Explanation / Answer
5. A. True [ as it is a concave lens]
B. True
C. False [ it produces virtual image]
D. False [ virtual images are on the same side]
E. False [ real image]
F. False [ real images are on the right side]
G. True
6. u = -8.5 cm
f = -7.5 cm
v = -3.984
h' = m*h = 0.2531 cm
7. f = 15.5 cm
m = 3.1 = -v/u
-1/3.1u - 1/u = 1/f
u = -20.5 cm
8. v = 63.55 cm
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