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 26 cm from a converging lens that has a focal length of 12 cm. At what
distance
from the lens will the image be formed?
7.1 cm
22.3 cm
4.5 cm
14.0 cm
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Question 2
How tall is the image formed in
Question 1
?
9.7 cm
3.1 cm
15.4 cm
4.9 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 26 cm from a diverging lens that has a focal length of -25 cm. At what
distance
from the lens will the image be formed?
12.7 cm
2.0 cm
51.0 cm
1.0 cm
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Question 5
How tall is the image formed in
Question 4
?
8.8 cm
0.7 cm
1.4 cm
35.3 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 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?
36.0 cm
8.0 cm
6.0 cm
4.0 cm
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