Position Object for Inverted, Magnified Image with Concave Mirror

[jsalapide]

Where do you put an object in front of a concave mirror of focal length 10 cm to produce an image that is inverted and 2.5 times greater than the object?

I have no idea how to solve this.. help..

 

[Doc Al]

What are the basic equations describing spherical mirrors and image formation?

 

[jsalapide]

i only know the equation on how to solve for the focal length

f= (pq)/(p+q)

where p is the distance of the object from the mirror and q as the distance of the image from the mirror.

 

[Doc Al]

Good. And how does image size relate to p and q?

 

[jsalapide]

i come to think of it, the image size does not change no matter what value of p and q is.

could that mean that there is no way that the image will be 2.5 times greater than the object?

 

[Doc Al]

i come to think of it, the image size does not change no matter what value of p and q is.

You'd better check that assumption. As you move the object around, the position and size of the image will change.