Photographic angle bisector

1 1. As shown in the figure, the plane mirrors OM and ON are placed vertically. At point P of their angular bisector, there is a spherical luminous body, the left half is bright and the right half is dark. There is a camera far to the left of point P, regardless of the imaging situation of the camera itself in the mirror, the schematic diagram of the photo taken is correct () A.B.C.? D.

Thinking analysis:

The imaging characteristics of plane mirror: the virtual image and object image of plane mirror are equal in size, the distance from object image to plane mirror is equal, and the connecting line between object image and mirror surface is vertical.

According to the imaging characteristics of plane mirror, images A and B of P are made of MO and NO respectively. A is imaged in a non-planar mirror, and B is imaged in a MO planar mirror. The two images overlap and the object is located between two vertically placed plane mirrors. We can see three images in the plane mirror.

The camera is on the same straight line as the objects P and C. When taking a picture, the image C is blocked by the object P, but the camera can't capture the image C, but it can capture the white face of the object P, like A, B and AB. Solution: Using the imaging characteristics of the plane mirror, the object P is imaged in the plane mirror MO, and the diameter of the black-and-white dividing line is determined for the black-and-white part of the ball. Similarly, make the image of the object P in a plane mirror.

Like objects P and C, the camera can only illuminate the white surface of object P on the same straight line, so the photo taken by the camera is D, that is,