1.

Focal length of concave mirror is f and ratio of heights of object to image for an object at x distance from mirror is .....

Answer»

`sqrt(f/x)`
`f/x`
`(f^2)/(x^2)`
`(f+x)/(f)`

SOLUTION :MAGNIFICATION for SPHERICAL mirror m = `(H.)/h`
`(f)/(f-u)=(h.)/h`
Here,u=f+x
`THEREFORE(f)/(f-(f+x))=(h.)/h`
`therefore(f)/(-x)-(h.)/h`
`therefore |(h.)/h|=f/x`


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