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What are Electromagnetic Waves? PowerPoint Presentation
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What are Electromagnetic Waves?

What are Electromagnetic Waves?

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What are Electromagnetic Waves?

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  1. What are Electromagnetic Waves?

  2. Remote controlled toys use electromagnetic waves to send signals from the remote to the object being controlled.

  3. Find as many facts about Electromagnetic waves as you can in 5 minutes (pages 71-75).

  4. Electromagnetic Waves Facts • Electromagnetic waves require no medium—they can travel through empty space or a vacuum. • Electromagnetic waves are transverse waves caused by changing electric and magnetic fields. • Energy transferred by electromagnetic waves is called “electromagnetic radiation” • Electromagnetic waves travel at the same speed... 186,000 miles per second (Sun to Earth ~8 minutes). • Electromagnetic waves have different wavelengths and frequencies (measured in Hz—just like sound waves).

  5. The Electromagnetic Spectrum

  6. Electromagnetic Wave Types Read pages 76-81 in your Science Explorer book to find the three most important facts about each of the following wave types and report them to the class: • Radio Waves • Microwaves • Infrared Rays • Visible Light • Ultraviolet Rays • X-Rays • Gamma Rays