Traditional Culture Encyclopedia - Photography and portraiture - (20 14? Peony area simulation), mm' is the interface between air and water, and SA is the light emitted by underwater lanterns, which is reflected by a plane mirror and along the BO side.

(20 14? Peony area simulation), mm' is the interface between air and water, and SA is the light emitted by underwater lanterns, which is reflected by a plane mirror and along the BO side.

First, the incident light and the reflected light intersect, then the bisector of the included angle between the reflected light and the incident light is made, which is the normal line during reflection, and then the plane mirror is perpendicular to the normal line of the reflection point;

The reflected light intersects the water surface at point O, and draws a refraction normal perpendicular to the water surface at point O. The refracted light is drawn in the air on the right side of the normal, and the refraction angle is greater than the incident angle, as shown in the figure: