物理：探究光的反射定律 反射光线、入射光线、法线，在同一平面内---**Chart/Diagram Description:** * **Type:** Physics diagram illustrating the law of reflection of light. * **Main Elements:** * **Horizontal Surface:** A flat, dark surface representing the reflecting medium (e.g., a mirror). * **Vertical Plane:** A rectangular plane (likely a screen or paper board) placed vertically on the horizontal surface. This plane is divided into two halves by a central point O. * **Point O:** The point of incidence, located on the horizontal surface, at the base of the vertical plane. * **Line Segment OE:** An incident ray of light, originating from point E on the top-left edge of the vertical plane and traveling towards point O. An arrow on the line indicates its direction towards O. A small square marker is visible along this line, possibly indicating a pin or a point on the ray path. A hand is shown holding the vertical plane near point E. * **Line Segment OF:** A reflected ray of light, originating from point O and traveling towards point F on the top-right edge of the vertical plane. An arrow on the line indicates its direction away from O. A hand is shown holding the vertical plane near point F. * **Dashed Line ON':** Represents the normal to the reflecting surface at point O. It is drawn as a vertical dashed line extending upwards from O. A right-angle symbol indicates that ON' is perpendicular to the horizontal surface at O. * **Angle 'i':** The angle of incidence, formed between the incident ray OE and the normal ON'. It is depicted as an arc with the label 'i'. * **Angle 'r':** The angle of reflection, formed between the reflected ray OF and the normal ON'. It is depicted as an arc with the label 'r'. * **Hands:** Two hands are shown, one on the left holding the vertical plane near point E, and the other on the right holding it near point F. This suggests the plane can be adjusted or folded, commonly used in experiments to demonstrate the coplanarity of incident ray, reflected ray, and normal. * **Relative Position and Direction:** * The vertical plane is perpendicular to the horizontal reflecting surface. * The incident ray (OE), the reflected ray (OF), and the normal (ON') all lie within the same vertical plane shown. * The incident ray strikes the surface at O, and the reflected ray originates from O. * The angles i and r are measured with respect to the normal ON'.