SCIENCE: GR.10 OPTICS CONVEX MIRRORS
posted by lily on .
A convex security mirror has a focal length of -0.25m. A person with a height of 1.5m is 4m from the mirror. calculate the image distance and image height.
An object 0.4m tall is placed 2.5m in front of a convex mirror that has a focal length of -90cm. Calculate image distance and image height.
In each case use the mirror formula
1/do + 1/di = 1/f
do = object distance
di = image doistance
Make sure you use negative f for the convex mirrors. The image height is di/do times the object heeight.