AT A  DEGREE  CAN   A   PLANE MIRROR   FORM A REAL  IMAGE

 Hi,

A plane mirror always forms virtual images.

First of all lets define real and virtual images. The real image is formed by actual convergence of rays. Virtual image is formed at a point where the rays appear to converge and are not converging in real.

Here in the diagram, notice the man standing in front of the mirror, the rays appear to diverge from him . In general, rays from real objects always diverge. Now see the image of the man behind the mirror. It is a virtual image. Let us consider it as an object. It will be a virtual object hence. Notice the hypothetical rays coming from him. They appear to converge. Hence if such a hypothetical situation arises , then a real image will be formed by a plane mirror provided the object is virtual.

 However this is a hypothetical case which we can prove but it is practically not possible.

A plane mirror follows the laws of reflection where the angle of reflection = angle of incidence.

Therefore indifferent of the angle of incidence  at which the object is , the reflected ray will always be at the same angle as the angle of incidence.