Physics Review Question

Unit: Optics
Year: 1990 Question#: 92
Question: If object ab is located 0.05 meters away from point o and the focal length is 0.04 meters, its image will be located ...

(1 ) farther from the mirror than c
(2 ) between c and f
(3 ) between f and the mirror
(4 ) behind the mirror
What is this question really asking?

Explanation by: IrinaK

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Answer 1 farther from the mirror than c

Using the formula

the answer is .2 meters away and that is further than c which is only .08 meters away. return to top

Answer 2
between c and f


The formula does not give an answer that could fit between those two points return to top

Answer 3
between f and the mirror

This distance is way too close. return to top

Answer 4
behind the mirror


This gives a virtual image not a real one. return to top

What's this question really asking?

Do you know how to use the formula. return to top

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