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## Homework Statement

You placed a 10cm high object in front of a mirror and got 5cm high virtual image at (-30cm). (Hint: watch the sign convention)

a. Find the magnification

b. Find the object distance from the mirror

c. Find the radius of curvature of the mirror

then I have to know if the mirror is convex or concave and if it is upright or inverted, but I think I can figure that out if I find the solutions to these problems.

## Homework Equations

I've figured out from the information that Ho= 10cm, Hi= 5cm, I think f= -30cm

For object distance, I can't figure out how I can possibly figure that out without any distances given. I'm not supplied with distance from focal point.

Any ideas on what I'm doing wrong?

and for radius, I have no idea where to begin.

## The Attempt at a Solution

for part a. M=Hi/Ho=5cm/10cm=1/2cm ? So does Magnitude equal 1/2cm?

I am not good at science, I am taking this as my gen-ed required science for my major. PLEASE help however you can.

Thanks so much :-)