Flat Mirrors (also called plane mirrors)
An object viewed using a flat mirror appears to be located behind the mirror, because to the observer the diverging rays from the source appear to come from behind the mirror.
The images reflected in flat mirrors have the following properties:
The image distance q behind the mirror equals the object distance p from the mirror
The image height h’ equals the object height h so that the lateral magnification
The image has an apparent left-right reversal
The image is virtual, not real!
Real Image where the light ray actually come to a focus you can actually see the object projected on a screen placed at that location
Virtual Image no light rays actually come directly from a virtual image, they just appear to the eye to do so. (When you see yourself in the mirror, are you actually located behind it as you appear?)
Images Formed by Spherical Mirrors
Principle Axis: OCIV
Center of Curvature C
Radius of Curvature R
Light rays converge to a real image at image point I
Where is the image formed? What is its height?
Is the entry for Image location q correct?
Note: a convex-concave lenses is sometimes referred to as a meniscus. It is the shape used for most eyeglasses.
Same as for mirrors!
(This is the thin lens equation)
Multiple Lenses Do the first lens as if the others weren’t there. Use the image formed by this lens as the object of the next lens Repeat this process for all the lenses in the system The total magnification is just the product of the individualmagnifications of each lens.
Most large telescopes use a concave mirror instead of a lens to form the image.