Solutions to classroom blackboard reflection

The methods to solve the problem of classroom blackboard reflection are: using the reflective characteristics of blackboard surface, adjusting the position and angle of blackboard, adjusting classroom lighting and so on. The detailed explanation is as follows:

1. Change the reflection characteristics of the blackboard surface: consider coating the blackboard surface to reduce reflection. This can be achieved by using a diffuse reflective coating or an anti-reflective coating. These coatings can reduce the specular reflection on the blackboard surface, thus reducing the reflection. Another method is to scrub the blackboard surface to make it rougher.

2. Adjust the position and angle of the blackboard: try to move the blackboard to a position where it will not be exposed to direct sunlight. If possible, consider installing shading facilities on both sides or at the top of the blackboard to prevent direct sunlight from hitting the blackboard. If possible, adjust the tilt angle of the blackboard to match the angle of sunlight as much as possible.

3. Adjust the lighting in the classroom: avoid using strong light: try to avoid using too strong light to directly illuminate the blackboard. You can consider using soft lighting, or adding a diffuser on the lampshade to make the light more uniform and soft. If possible, adjust the position of the light so that it does not directly illuminate the blackboard.

4. Use teaching materials and teaching AIDS to prevent reflection. Use special teaching materials and teaching AIDS: Consider using some teaching materials and teaching AIDS specially designed to prevent reflection, such as using special paper or electronic equipment, which can reduce reflection or enhance contrast.

Knowledge of light

1, the definition of light: light is a straight line indicating the direction of light propagation. It is sometimes figuratively called the "path" of light. Light is fictional and does not exist in the actual physical space. Light travels in a straight line, which enables us to describe the path of light accurately.

2. Light and vision: We can see things because light enters our eyes. Luminous objects are considered as light sources, such as light bulbs and the sun. Light will have a great influence on what we see. For example, light can change the color, shape and size of objects.

3. Light and optics: reflection: light will be reflected when it meets a reflecting surface, which is caused by the fluctuation of light. For example, a mirror can reflect light. Refraction: when light passes through media with different refractive indexes, it will be refracted. This is due to the particle nature of light.

4. Light and photography: Exposure: In photography, correct exposure is the key to taking clear photos. Overexposure will cause the picture to appear too bright, and underexposure will cause the picture to appear too dark. In photography, the direction of light is very important to the shooting effect. Shooting along the light can make the subject brighter, while shooting against the light will produce strong contrast and clear outline.