An infinitely long bar lies alont the a...

An infinitely long bar lies alont the adis of cancave mirror of focal length f. the nerar end of bar is a distance `v gt f` from the mirror. Its images will have a length

`frac(uf)(u + f)`

`frac(uf)(u - f)`

`frac(f^2)(u + f)`

`frac(f^2)(u - f)`

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