convex...concave... mirrors.... lenses....

ques.

what's the diff. bet. a mirror and a lense???

ans. Concave mirrors and converging lenses are the same in getting its computation about the di, do, ho, hi and the focal length. It's the same with the diverging and convex. the diff. is that when we draw lenses, its like this: () and when we draw a mirror, whether a concave and a convex its, ) for concave and ( for convex. (wee... i asked anna about this... thank you anna!)

ok...

let's move to plane mirror

when rays diverge from an object and are reflected or refracted, the directions of outgoing rays are the same as though thay had diverged from an image. If yhey actually converge at the image and diverge again beyond it, the image is a real image of the object; if they only appear to have diverged from the image, it is a virtual image. Images can be erect or inverted.

formula of getting the do, di, focal length and magnification of convex and concave mirrors....

f= dido

do-di

do= fdi

di-f

di= fdo

do-f

M= hi = -di

ho do

if the magnification is negative, it is a real image.... if not, it is a virtual image...