Invisible Light - Self-made Currency Checking Machine Course Presentation

（1）Understanding the Sun's Spectrum and Invisible Light Initially

(2) An initial understanding of infrared radiation and its functions;

(3) A preliminary understanding of ultraviolet light and its effects.

（1）Observe and understand the effects of infrared and ultraviolet light.

(2) By collecting and exchanging information on infrared and ultraviolet rays, we obtain methods for processing information.

The characteristics of ultraviolet light:

(1) There is a chemical reaction that can make the film sensitive to light, and a camera with ultraviolet light can clearly distinguish fingerprints left on the paper.

(2) Has strong fluorescence effect, which can cause fluorescent substances to emit fluorescence.

(3) Has physiological effects, and is commonly used in medical treatment for ultraviolet sterilization.

(4) Ultraviolet light can promote the synthesis of vitamin D and can treat various diseases caused by the lack of vitamin D, such as skin diseases and rickets.

Please design an inquiry experiment to make a self-made currency detector.

Infrared

Definition: The light beyond red in the spectrum that is invisible is called infrared.

Characteristics: Strong thermal effect, strong penetrating cloud and fog capability, and can be used for remote control.

Infrared night-vision device, infrared remote sensing, infrared remote controller, infrared diagnosis, red.

Outer line physical therapy, infrared drying machine, infrared oven, infrared bath, infrared

Automatic faucet, infrared automatic hand dryer, infrared automatic door, infrared automatic

Follow-up camera

应用

ultraviolet

Definition: The light beyond violet that is invisible on the spectrum is called ultraviolet.

Characteristics: Strong chemical action, fluorescence effect, strong physiological effects, appropriate irradiation is beneficial to physical health.

Ultraviolet Photography, Ultraviolet Roadmarking, Ultraviolet Warning Signs, Ultraviolet Currency Verifier

ultraviolet identification of ancient calligraphy and painting, ultraviolet disinfection lamp, ultraviolet mosquito killer, ultraviolet health

Kang therapy, UV protection mask

The purpose of the experiment: to make a homemade currency detector and verify its practicality.

Experimental principle: UV light has a fluorescence effect.

Experimental equipment: One LED ultraviolet lamp, a set of accessories, a 3V battery, and one 50-yuan and one 100-yuan banknote each.

Experiment steps: (1) Make a currency detector, take two bills and observe them under a desk lamp to see if they emit blue light.

 (2) Turn on the power and switch on the ultraviolet lamp. Place the 50 yuan and 100 yuan bills under the light to observe. It is found that the fluorescent marks are present, indicating that the homemade currency verification mechanism has been successfully made.

     课后总结：

1. Turn on the television and use the remote control to switch channels directly facing the television. Ensure that the remote control is functioning properly. Place a piece of paper along the direct line between the remote control and the television. Observe whether the remote control still works. Change the location of the paper and repeat the test several times. Based on the observed phenomena, draw a conclusion.

2. Infrared waves propagate in air in a straight line, and can also be used for remote control in the direction of walls, floors, and other surfaces, due to the reflection of infrared waves by these surfaces.

Company Profile

 Chili Toy Factory was established in 2007. After ten years of unremitting efforts, our company has gradually matured; We are a member of the National Ministry of Education Teaching Equipment Industry Association and a backbone enterprise of Zhejiang Province Teaching Equipment. The company has been awarded the "Heavy Contract and Credit-Keeping" unit by Yiwu City for three consecutive years, and in 2014, it was designated by the Zhejiang Provincial Education Bureau as the "Culture and Popularization Experiment Equipment Fixed-point Production Unit".

AiGou Company is a high-tech enterprise that integrates modern scientific research and development, educational equipment, curriculum design, teaching resource integration, and technical services. AiGou, with its high-tech products, is a professional enterprise in the development and production of popular science experiment teaching materials in the country. The products are exported to Europe and the United States.
After years of accumulation, the company has initially reached a certain scale. In terms of technological innovation, the company has professional design personnel engaged in the development of scientific education products and the upgrade and replacement of existing products. In terms of production, management, and service, the company strictly implements the standards of the ISO9001 international quality assurance system. In marketing, the AiGou products have been entered into many provinces and cities in the country and enjoy a good reputation. For many years, it has provided high-quality, advanced, professional series of modern teaching equipment and professional equipment research and development custom services for the educational community. With excellent, high-quality professional talents and perfect after-sales service, it ensures the excellence of product quality and establishes a good corporate image. The scientific education physical series, chemical series, photovoltaic, wind energy, geography, biology, art and other products of Qiquan have successfully won bids in the education bureau tenders for many times.

 Chilvog Company continues to adhere to the business philosophy of 'quality first, service diligent, and honesty in conduct', providing excellent equipment and high-quality service for school teaching and research. We are willing to work diligently with new and old friends at home and abroad, join hands to progress, and devote our utmost efforts to education, contributing to the cause of education.

 Love to buy allows every child to keep up with the times!!!