Practice Problems
Thin Lens Equation
Directions:
On this worksheet you will be able to practice using the thin lens equation with spherical lenses.
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Question 1
A 17-cm tall object is placed 31 cm from a converging lens that has a focal length of 14 cm. At what
distance
from the lens will the image be formed?
25.5 cm
5.9 cm
3.9 cm
17.0 cm
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Question 2
How tall is the image formed in
Question 1
?
3.2 cm
2.1 cm
9.3 cm
14.0 cm
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Question 3
Describe the image formed in
Question 1
.
virtual and upright
real and inverted
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Question 4
The same 17-cm tall object is now placed 31 cm from a diverging lens that has a focal length of -29 cm. At what
distance
from the lens will the image be formed?
2.0 cm
15.0 cm
60.0 cm
1.7 cm
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Question 5
How tall is the image formed in
Question 4
?
8.2 cm
32.9 cm
0.9 cm
1.1 cm
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Question 6
Describe the image formed in
Question 4
.
real and inverted
virtual and upright
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Question 7
Which image, that produced in
Question 3
or in
Question 6
, was formed by converging rays?
Question 3
Question 6
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Question 8
Which lens could be used to produce a virutal image taller than the object?
Question 4
Question 1
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Question 9
At what
distance
in front of the lens in
Question 8
should the 17-cm tall object be placed to produce a virtual image that is 4 times taller?
56.0 cm
10.5 cm
3.5 cm
9.3 cm
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