People's Education Edition Physics for Grade 8, Volume 2
People's Education Edition Ninth Grade Physics Complete Book
Shanghai Science Edition Ninth Grade Physics
People's Education Edition Physics for Grade 8, Volume 1
Beijing Normal University eighth grade physics volume one
Shanghai Science Edition 8th Grade Physics
Lu Jiao Edition Ninth Grade Physics Volume 1
Lu Jiao Edition Ninth Grade Physics Volume 2
Beijing Normal University Ninth Grade Physics Volume 1
Guangdong and Shanghai Edition Ninth Grade Physics Volume 1
Lu Ke Edition High School Physics Compulsory Course One
People's Education Press High School Physics Compulsory Course II
Beijing Normal University Ninth Grade Physics Volume 2
Lu Jiao Edition Eighth Grade Physics Volume 2
Guangdong and Shanghai version of eighth grade physics volume 2
Lu Jiao edition eighth grade physics volume 1
!["Dispersion of Light" PPT courseware on light phenomena](https://resources2020.oss-cn-beijing.aliyuncs.com/resources2020/6d633f1973e3bb63d8934b67c82cb290.jpg)
Category | Format | Size |
---|---|---|
People's Education Edition Physics for Grade 8, Volume 1 | pptx | 6 MB |
Description
"Dispersion of Light" PPT courseware on light phenomena
Consolidate and think
[Dispersion Demonstration Experiment] Let a beam of sunlight shine on a prism. What happens to the light emerging from the prism?
Laws of refraction of light:
① When light is refracted, the refracted ray, incident ray and normal line are in the same plane;
②The refracted ray and incident ray are located on both sides of the normal;
③The refraction angle changes with the change of the incident angle: when the incident angle increases, the refraction angle also increases; when the incident angle decreases, the refraction angle also decreases.
Two-corner relationship:
When light is incident obliquely from air into a transparent substance such as water or glass, the angle of refraction is smaller than the angle of incidence;
When light is incident obliquely into air from a transparent substance such as water or glass, the angle of refraction is greater than the angle of incidence.
1. Dispersion of light
Phenomenon: Sunlight (white light) is decomposed into seven colors of light after passing through a prism, which are red, orange, yellow, green, blue, indigo, and violet.
Concept: After passing through a prism, sunlight is decomposed into light of various colors. This phenomenon is called dispersion of light. (notes)
[Conclusion] Sunlight (white light) is a mixture of seven monochromatic lights: red, orange, yellow, green, blue, indigo, and violet. (notes)
Understand monochromatic light and polychromatic light
Monochromatic light: Light that cannot be decomposed after passing through a prism.
Complex color light: It is composed of light of various colors.
2. Mixing of colors and lights
1. The three primary colors of light: red, green, and blue
Mixed in equal proportions into white light
How are the colors in color TVs produced?
The color of the TV picture is composed of three color bars: red, green and blue.
3. Invisible light
1. solar spectrum
The spectrum is formed by decomposing sunlight into different colors of light and arranging them in the order of red, orange, yellow, green, blue, indigo and violet.
Invisible light beyond red light on the spectrum is called infrared, and invisible light beyond violet is called ultraviolet light.
2.Infrared ray
Invisible light other than red light on the spectrum is called infrared light. Although it cannot be seen by the human eye, its existence can be detected with a sensitive thermometer. It is invisible light.
(1) Characteristics of infrared:
① Infrared rays have a thermal effect and can heat the irradiated object;
②The heat of the sun is mainly transmitted to the earth in the form of infrared radiation;
③Objects can absorb infrared rays and also radiate infrared rays.
(2) Application of infrared:
①Infrared heating
②Infrared remote control
③Infrared imaging
3. UV rays
(1) Characteristics and applications of ultraviolet light
①The most significant feature of ultraviolet light is that it can make fluorescent substances glow.
②Ultraviolet disinfection and sterilization
(2) UV protection
Excessive ultraviolet rays can burn the skin and even cause cancer, affecting the survival of animals, plants, and humans.
Mountaineers have to wear special black glasses, and people hold up parasols in the hot summer. Why is this?
summary
1. White light is a mixture of red, orange, yellow, green, blue, indigo, violet and other colors of light.
2. The three primary colors of light: red, green, and blue
3. Characteristics and practical applications of infrared: body temperature measurement, night vision, heating, etc.
4. Characteristics of ultraviolet light, practical applications and hazards: fluorescence effect, banknote inspection, sterilization and disinfection, etc.
Consolidation exercises
1. After sunlight passes through a prism, it will be decomposed into light of various colors. If a white screen is used to receive it, the order of colors on the white screen is red, _____, _____, ______, ______, ______, _____. this means_______________.
2. The colors of color TVs are produced by the electron guns in the TV shooting onto the phosphors on the inside of the screen. According to the mixing rules of color light, only three colors of electron guns, _____, _____, and _______, are needed in the TV. Can be matched with a variety of brilliant colors. Red, green, and blue are called ___________ of light.
3. In the recent U.S. and British coalition operations against Iraq, U.S. and British soldiers wore infrared night vision goggles at night, which allowed them to spot the enemy even in the dark night. Infrared night vision goggles are made based on the principle that the _______ of people at night is _______ than the temperature of surrounding vegetation or buildings, and the _______ of human body radiation is _______.
4. Ultraviolet rays are also invisible light that can cause fluorescent substances to ____. Appropriate ultraviolet rays help the human body synthesize vitamin D. Excessive ultraviolet rays ____ the human body.
5. The anti-counterfeiting marks of RMB and some trademarks can be identified with ________ lights.
Keywords: light phenomenon teaching courseware, light dispersion teaching courseware, People's Education Edition eighth grade physics PPT courseware download, eighth grade physics slide courseware download, light phenomenon PPT courseware download, light dispersion PPT courseware download, .PPT format;
For more information about the "Light Phenomenon Dispersion of Light" PPT courseware, please click the "Light Phenomenon ppt Dispersion of Light ppt" tag.
"Dispersion of Light" Light Phenomenon PPT Courseware 10:
"Dispersion of Light" Light Phenomenon PPT Courseware 10 1. Dispersion Question: How is a rainbow formed? Answer: There are a large number of tiny water droplets suspended in the sky after a rain. When sunlight hits these small water droplets, dispersion occurs and is broken down into brilliant seven-color light. So sometimes I...
"Dispersion of Light" Light Phenomenon PPT Courseware 9:
"Dispersion of Light" Light Phenomenon PPT Courseware 9 Review the past and learn the new 1. When light is incident from the air into the glass obliquely, the refracted light is deflected in the direction of the ______ normal. (fill in closer or farther away) 2. A beam of light is incident obliquely to Draw the refraction of light on a glass prism (as shown below). Teaching..
"Dispersion of Light" Colorful Light PPT Courseware 4:
"Dispersion of Light" Colorful Light PPT Courseware 4 1. Experimental study on the dispersion of light: Animation demonstration: Think about it: How many colors are the sunlight mixed with? The experiment shows that the sunlight can be decomposed into red and orange , yellow, green, blue, indigo and purple seven colors of light. Why is the sky...
File Info
Update Time: 2024-08-22
This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 1 industry PPT template
"Dispersion of Light" PPT courseware on light phenomena Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Dispersion of Light" PPT courseware on light phenomena is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Dispersion of Light" PPT courseware on light phenomena, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Preview
![《光的色散》光现象PPT课件
(1)](https://resources2020.oss-cn-beijing.aliyuncs.com/resources2020/6d633f1973e3bb63d8934b67c82cb290.jpg)
![《光的色散》光现象PPT课件
(2)](https://resources2020.oss-cn-beijing.aliyuncs.com/resources2020/636474ed0f681c7eba33d09f26799b8c.jpg)