Question

write an equation which related is to the size of object and size of image

Answer 1

hi/ho = v/u = magnification
where, hi = height of image
ho = height of object
v = distance of image from the optical centre
h = distance of object from the optical centre

Answer 2

m=h'/h
=-v/u
That means that magnification is equals to height(size) of image by height(size) of object which is equal to image distance which is negative by object distance in the case of mirror ........
If it is in the case of lens only one difference that is image distance is positive..


Hope this answer will be helpful....