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

## Answer This Question

## Related Questions

- physics - Because a concave lens cannot form a real image of a real object, it ...
- calculus - If f is the focal length of a convex lens and an object is placed at ...
- physics - A convex lens with a focal length of 20 cm is placed in front of a ...
- physics - An object is placed (a) 6cm (b) 20cm from a thin convex lens of focal ...
- physics - an object is placed 15 cm in front of a convex lens of focal length ...
- Physics - An object is placed to the left of a lens, and a real image is formed ...
- Physics: Lenses - 1) A convex lens with a focal lenght of 4.0cm is placed 20.0cm...
- physics - The convex meniscus lens has a 15cm radius for the convex surface and ...
- Physics - two converging lenses placed L1=20 cm apart. the focal lengths are f1=...
- physics - A 5.0-cm real object is placed at a distance of 30.0 cm from a concave...

More Related Questions