Question

convex mirror of focal length fforms an image
Which is 1/n times the object. The distance of the
bject from the mirror is
​

Answer 1

Answer:

will use the formula, m= f /(f - u)           (1).

HERE, 

m = +(1/n)  ; f = +f ; u= – u . (since mirror is convex).

So, using those, equation (1) becomes,

(1/n) = f /(f+u)    

or, (f+u)=nf

or, u = nf – f

or, u =(n – 1) f. (ans)

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