How "Electromagnetic Waves" Transmits Information—Introduction to Communication Technology PPT Courseware 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!
| 文件名 如何下载使用 | 下载次数 | Download Points | 下载地址 |
|---|---|---|---|
| How "Electromagnetic Wav... | 18750次 | 0.00 | Free Download |
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content How "Electromagnetic Waves" Transmits Information—Introduction to Communication Technology PPT Courseware 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
How "Electromagnetic Waves" Transmits Information—Introduction to Communication Technology PPT Courseware, 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.)
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view:Please click to see
Authoritative PPT Summary
How "Electromagnetic Waves" Transmits Information—Introduction to Communication Technology PPT Courseware
The propagation of television signals relies on electromagnetic waves
Mobile phones rely on electromagnetic waves to transmit information
How are electromagnetic waves generated?
How do electromagnetic waves propagate?
What is the relationship between wavelength, wave speed, and frequency?
1. Generation of electromagnetic waves
listen
Radio: makes a "click" sound
Electromagnetic wave generation demonstration experiment
Conclusion Rapidly changing electric current can produce electromagnetic waves in the surroundings.
Essence: Electromagnetic field energy spreads from near to far.
Oscillating current
Concept: Specialized electronics and circuits are used to generate electrical current that changes very quickly.
Oscillating current is a periodically changing current. The speed of change is expressed by frequency, and the unit of frequency is Hertz (Hz). There are also kilohertz (kHz), megahertz (MHz), gigahertz (GHz).
1kHz=103Hz
1MHz=106Hz
1GHz=109Hz
2. Propagation of electromagnetic waves
The propagation of sound requires solid, liquid, gas and other media.
Does the propagation of electromagnetic waves require a medium?
small experiment
Put a mobile phone into the vacuum cover and dial the number of the mobile phone. Does the phone respond?
in conclusion
The propagation of electromagnetic waves does not require a medium.
1. Electromagnetic waves can propagate in a vacuum
2. Several elements of electromagnetic waves
(1) Wavelength: the distance between two adjacent wave crests (or troughs).
Unit: m
(2) Wave speed: how fast the wave propagates. Unit: meters/second
3． propagation speed of electromagnetic waves
In vacuum: c =2.997 924 58 ×108 m/s
In air: close to the speed of light in vacuum
Light is an electromagnetic wave
Class summary
Rapid changes in current in a wire can stir up electromagnetic waves in space.
Electromagnetic waves can propagate in media as well as in vacuum.
The propagation speed of electromagnetic waves in vacuum
c =2.997 924 58×108 m/s ≈3×105 km/s
Keywords: electromagnetic wave teaching courseware, how to deliver an introduction to information and communication technology teaching courseware, Beijing Normal University edition ninth-grade physics PPT courseware download volume 2, ninth-grade physics slide courseware download, electromagnetic wave PPT courseware download, how to deliver an introduction to information and communication technology PPT courseware Download, .PPT format;
For more information about the PPT courseware "How Electromagnetic Waves Transmit Information and Communication Technology Introduction", please click the "How Electromagnetic Waves PPT Transmits Information and Communication Technology Introduction PPT" tag.
"Into the Internet" Electromagnetic Waves and the Information Age PPT Courseware 2:
"Into the Internet" Electromagnetic Waves and the Information Age PPT Courseware 2 Objective: Understand the interconnection of information and the functions of the Internet. Learn to send and receive emails. Internet: Use electromagnetic waves and communication networks to connect computers distributed around the world..
"Into the Internet" Electromagnetic Waves and the Information Age PPT courseware:
"Into the Internet" Electromagnetic Waves and the Information Age PPT Courseware Teaching Objectives 1. Understand how information is interconnected and know some functions of the Internet 2. Learn to use the Internet to enter your favorite websites and search for the learning materials you need. Learn to send and receive electronic...
"Radio, Television and Communications" Electromagnetic Waves and Information Age PPT courseware:
"Radio, Television and Communications" Electromagnetic Waves and Information Age PPT Courseware Review: 1. How are electromagnetic waves generated? How to indirectly observe its existence through experiments? Electromagnetic waves are produced by changing electric currents, and when a fluorescent lamp is turned on, noise is heard on a nearby radio..