1.An infinitely long rod lies along the axis of a concave mirror of focal length fff. The near end of the rod is at distance u>fu > fu>f from the mirror. Its image will have a length:a.ufu−f\dfrac{uf}{u - f}u−fufb.ufu+f\dfrac{uf}{u + f}u+fufc.f2u+f\dfrac{f^2}{u + f}u+ff2d.f2u−f\dfrac{f^2}{u - f}u−ff2Login to continueOnly logged in users canattempt or see the solution.