Posted by **Sonia** on Monday, April 25, 2011 at 4:18pm.

I have been working on this homework question for a bit, but I just can't get it. Please help me!

Where must an object be placed with respect to a convex lens (f=20cm) to generate an upright image that is 4 times as large as the object?

10 cm in front

10 cm behind

55 cm in fromt

55 cm behind

20 cm in front

20 cm behind

15 cm in front

15 cm behind

none listed

I think 55 cm in front, but I'm not sure.

- Physics -
**Sandy**, Friday, April 5, 2013 at 1:54pm
15 cm in front

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