Practice Problems
Thin Lens Equation
Directions:
On this worksheet you will be able to practice using the thin lens equation.
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Question 1
A 18-cm tall object is placed 20 cm from a converging lens that has a focal length of 10 cm. How far from the lens will the image be formed?
20.0 cm
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Question 2
How tall is the image formed in
Question 1
?
18.0 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 20 cm from a diverging lens that has a focal length of -22 cm. How far from the lens will the image be formed?
10.5 cm
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Question 5
How tall is the image formed in
Question 4
?
9.4 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 lens could be used to produce a virutal image taller than the object?
Question 1
Question 4
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Question 8
At what distance in front of the lens in
Question 7
should the 18-cm tall object be placed to produce a virtual image that is 3 times taller?
7.5 cm
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