1 / 10

Electromagnetic Waves

Electromagnetic Waves. Chapter 12. What is an Electromagnetic Wave?. Electromagnetic wave – is made by vibrating electric charges and can travel through space No medium is needed…. What is an Electromagnetic Wave?.

hoai
Download Presentation

Electromagnetic Waves

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electromagnetic Waves Chapter 12

  2. What is an Electromagnetic Wave? • Electromagnetic wave – is made by vibrating electric charges and can travel through space • No medium is needed…

  3. What is an Electromagnetic Wave? • Electromagnetic wave – is made by vibrating electric charges and can travel through space • No medium is needed… • Electric and magnetic fields are related forces. • A moving electric charge creates a magnetic field • Changing magnetic fields create changing electric fields and vice versa

  4. Electromagnetic Fields • Carry radiant energy • Electromagnetic waves travel in a vacuum (empty space) at 300,000 km/s • they slow as they travel through matter

  5. The Electromagnetic Spectrum • Radio waves • Infrared waves • Visible light • Ultraviolet light • X rays and gamma rays

  6. Uses of Electromagnetic Spectrum • Radio waves - Microwaves, Radar, and Magnetic Resonance Imaging (MRI) • Infrared waves – felt as thermal energy or warmth • Visible light – duh… we see with this light • Ultraviolet waves – kill bacteria and can be absorbed by fluorescent materials and released as visible light • X rays and gamma rays – provide images of bones, examines within materials, radiation therapy

  7. Radio Communication • Radio converts electromagnetic waves into sound waves

  8. Television • Sounds and images changed into electronic signals broadcast by carrier waves • Carrier wave – a specific frequency in which each channel is assigned (used in radio too)

  9. Telephones • Microphone converts sound waves into electrical signal.

More Related