Geometric Optics question

1. Apr 29, 2005

sghaussi

Hello, I have been having some difficutly answering the following question:

An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a convex spherical mirror having a radius of curvature of 22.0 cm.

Determine the position of the image.

I used the formula: (1/s) + (1/s_prime) = 2/R

s being the distance of the object from the mirror
s_prime being the distance of the image
R being the radius of curvature

By position do they mean s_prime?

The above formula didn't work for me, I also tried a few other ways but I keep getting the wrong answer. Hope you can help. =)

2. Apr 29, 2005

juvenal

Yes, they do mean s_prime, and if the formula doesn't work for you then your algebra is incorrect.

3. Apr 29, 2005

siddharth

Did you apply the appropriate sign conventions?

4. Apr 29, 2005

sghaussi

I didn't, and that was my mistake. Thanks for your help!