ratio

Asked by SSHHII | 10th Dec, 2009, 10:17: PM

Expert Answer:

Given that focal length = - f, object distance, u = - (f+p)

Using mirror formula

(1 / v) + (1 / u) =  (1 / f)

(1 / v) - (1 / f+p)= - (1 / f)

1/ v = - (1 / f) + (1 / f+p) = p / f(f+p)

v = f(f+p)/p

Ratio of size of  image to size of object =  - v / u = magnification

                                                                      = - {f(f+p) / p} / - (f+p)

                                                                      = f / p

 

Answered by  | 12th Jan, 2010, 02:55: PM

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