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 18-cm tall object is placed 22 cm from a converging lens that has a focal length of 11 cm. At what
distance
from the lens will the image be formed?
22.0 cm
11.0 cm
4.5 cm
9.1 cm
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Question 2
How tall is the image formed in
Question 1
?
3.7 cm
18.0 cm
9.0 cm
7.4 cm
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Question 3
Describe the image formed in
Question 1
.
real and inverted
virtual and upright
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Question 4
The same 18-cm tall object is now placed 22 cm from a diverging lens that has a focal length of -25 cm. At what
distance
from the lens will the image be formed?
47.0 cm
3.0 cm
2.1 cm
11.7 cm
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Question 5
How tall is the image formed in
Question 4
?
1.7 cm
2.5 cm
9.6 cm
38.5 cm
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Question 6
Describe the image formed in
Question 4
.
virtual and upright
real and inverted
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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 1
Question 4
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Question 9
At what
distance
in front of the lens in
Question 8
should the 18-cm tall object be placed to produce a virtual image that is 3 times taller?
33.0 cm
3.7 cm
7.3 cm
5.5 cm
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