Question

A thin bar of length f is placed horizontally along the pricipal axis of a concave mirrior of focal length f in such a way that centre of the bar coincides with centres of curvature of the mirror The length of image of bar will be

Answer 1

When we place an object at center of curvature of concave mirror, the nature of image is real and inverted. Size of image will be the same size as object size. And the position of image be at the center of curvature. Centre of curvature is represented by the letter ‘C’. Here a thin bar of length is placed horizontally along the principle axis of a concave mirror. The mirror have focal length ‘f’ and the Centre of bar is coincide with Centre of curvature of mirror. Therefore the length of image of bar is same as the object length ‘f’.