About This

• Size: 28*17*10cm
• Suitable for junior middle school physics teaching, demonstrates the law of reflection and refraction of light
• Insert the light source into the light source holder, and move the axis on the image of the condenser. At this time, the light emitted by the light source is the strongest and approximately parallel light, and the experiment can be carried out.
• By adjusting the angle between the light emitted from the light source and the normal of the demo screen, various incident and reflection phenomena can be seen.
• If the demo screen is in a horizontal position, the incident sun rays are reflected when they coincide with the normal of the demo screen. The angle measured at this time is the angle between the sun rays and the horizon. Long-term observations at different angles measured at different times of the day are sufficient. Estimate the local time.