Unit: Lenses
Year: 1997 Question#: 93
Question: An object is placed 0.30 meters from a crown glass lens of focal length 0.10 meter. How far from the lens will an image of the object be formed?
(1 ) 0.30 m
(2 ) 0.20 m
(3 ) 0.15 m
(4 ) 0.10 m
What is this question really asking?
Explanation by: Weirui Z.
[ Return to question menu ]
Answer 1
0.30 m
INCORRECT
According to the explanation for answer 3, .15m is the correct answer. return to top
Answer 2
0.20 m
INCORRECT
According to the explanation for answer 3, .15m is the correct answer. return to top
Answer 3
0.15 m
CORRECT
The inverse of the focal length is equal to the sum of the inverses of the distances.
return to top Answer 4
0.10 m
INCORRECT
According to the explanation for answer 3, .15m is the correct answer. return to top
What's this question really asking?
How far from the lens will an image of the object be formed if the lens has a focal length of .10? return to top
