Question

When does a concave mirror form image of the same size as that of the object?​

Answer 1

Answer:

When it is on its principal Axis

Answer 2

Explanation:

In all cases of a simple curved mirror, it is helpful to think of a ray which is incident obliquely from the top of the object onto the centre of the mirror. At that point the surface must be perpendicular to the axis, and the ray will reflect off at the same angle. If the image is the same height as the object, its distance from the mirror must be the same. (For the same reason, if the distances are not the same, (height of image)/( height of object) = (image distance)/(object distance).

If object and image distances u and v are the same,

then 1/f = 1/u + 1/v =1/u + 1/u = 2/u ;

Enough Help For Now I Hope!