Bk8907
Apr23-07, 12:52 AM
1. The problem statement, all variables and given/known data
An object 30 cm tall is placed 20 cm in front of a convex mirror. If the height of the image is +10 cm, find the focal lenght of the mirror.
2. Relevant equations
3. The attempt at a solution
I know to use 1/f = -(Image distance from V) / Object distance from V. But, now they tell me how tall they are. How to solve now?
An object 30 cm tall is placed 20 cm in front of a convex mirror. If the height of the image is +10 cm, find the focal lenght of the mirror.
2. Relevant equations
3. The attempt at a solution
I know to use 1/f = -(Image distance from V) / Object distance from V. But, now they tell me how tall they are. How to solve now?