Register to reply

Finding height of image for a concave mirror

by chester89
Tags: concave, height, image, mirror
Share this thread:
Nov21-05, 09:31 PM
P: 4
Ok, theres something I just don't understand. I know that to find the height of an image (hi), you need to use the magnification equation m = -di/do = hi/ho. And for this question, the focal length (f), distance of object (do), and distance of image (di) are given. Now, if I want to find the height of the image (hi), I would need the height of the object (ho) to finish the equation, but I don't, so now I'm stumpted on what to do with this question.

I know 'hi = -diho/do' is the equation but if I don't have ho, than how can I find hi.

Any help would be greatly appreciated.
Phys.Org News Partner Science news on
World's largest solar boat on Greek prehistoric mission
Google searches hold key to future market crashes
Mineral magic? Common mineral capable of making and breaking bonds
Nov22-05, 06:06 AM
HW Helper
P: 661
Edited, misinterpretation.

I don't believe you can find the height of the image without the height of the object. The focal length and a given object distance will determind the image distance. No other focused distance is possible. We cannot arbitrarily choose some image distance.

Register to reply

Related Discussions
Image in a concave mirror Introductory Physics Homework 0
Concave mirror and virtual image General Physics 1
An image is magnified by 2.50, concave mirror confusion! wee Introductory Physics Homework 3
Double Concave Mirror Image General Physics 1
Concave mirror Introductory Physics Homework 5