How Does a Concave Mirror Affect Image Characteristics?

[cybernerd]

Homework Statement

What is the relative size, orientation, and type of image from an object placed at the centre of a concave mirror?

Homework Equations

I drew a ray diagram for this.

The Attempt at a Solution

The image will be erect, the same size and real.

That seemed too easy. Am I doing something wrong here?

 

[cryptoguy]

Take another look at your ray diagram because one of those statements is incorrect

 

[cybernerd]

Okay. I think I know what I did wrong - the image should be smaller, not the same size...I think...

 

[cryptoguy]

no, if the object is in the center, it would in fact be the same size. Did you draw one ray eminating from the object horizontally, hitting the mirror and passing through the focus? And another passing through the focus reflecting off the mirror and traveling horizontally? Easiest pair, imo.

 

[cybernerd]

wait, you're right, I drew a diagram for a convex LENS. My mistake.

So my image is going to be erect, the same size, and real.

 

[cryptoguy]

that's exactly what you said in your original post... You still need the info for a concave mirror right? If so, one of those is still incorrect