1 / 26

Electromagnetic Radiation

Electromagnetic Radiation. Science Standard. S8P5 : Students will explore the wave nature of sound and electromagnetic radiation. . Essential Question. What are some everyday uses of electromagnetic radiation (or waves)? . Waves… a review. Most waves are either longitudinal or transverse.

fathi
Download Presentation

Electromagnetic Radiation

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 Radiation

  2. Science Standard S8P5: Students will explore the wave nature of sound and electromagnetic radiation.

  3. Essential Question What are some everyday uses of electromagnetic radiation (or waves)?

  4. Waves… a review • Most waves are either longitudinal or transverse. • Sound waves are longitudinal. • But all electromagnetic waves are transverse…

  5. ? ?

  6. Electromagnetic waves • Produced by the movement of electrically charged particles • Can travel in a “vacuum” (they do NOT need a medium)

  7. Electromagnetic waves • Travel at the speed of light (300,000,000 m/s in a vacuum ) * Travels slower when passing through a medium • Also known as EM waves because they are surrounded by: i.Electricfields ii.Magneticfields

  8. Wave-particle Duality • Light can behave like a wave or like a particle • Travels in bundles of energy • Bundles act like small particles • A “particle” of light is called a photon

  9. Wave-particle Duality • All electromagnetic waves travel at the same speed • Frequency and wavelength are used to classify the waves in the electromagnetic spectrum

  10. Wave-particle Duality

  11. ElectromagneticSpectrum • The electromagnetic spectrum is the complete range of electromagnetic waves placed in order of increasing frequency.

  12. ElectromagneticSpectrum

  13. ElectromagneticSpectrum

  14. ElectromagneticSpectrum • As the frequency increases: a.Wavelengthdecreases b.Photonpenetrating energy increases

  15. Radio waves • Longest wavelength EM waves Low Frequency & Lowest Photon Energy • Uses: • TV broadcasting • AM and FM broadcast radio • Avalanche beacons • Heart rate monitors • Cell phone communication

  16. Microwaves • Wavelengths from 1 mm- 1 m • Uses: • Microwave ovens • Bluetooth headsets • Broadband Wireless Internet • Radar • GPS

  17. Infrared Radiation • Wavelengths in between microwaves and visible light • Uses: • Night vision goggles • Remote controls • Thermal Energy Transfer • Heat-seeking missiles

  18. Visible light • Only type of EM wave able to be detected by the human eye • Violet is the highest frequency light • Red light is the lowest frequency light • Only EM we can see

  19. Ultraviolet • Shorter wavelengths & higher frequency than visible light • Uses: • Black lights • Sterilizing medical equipment • Water disinfection • Produces vitamin D in human skin • Security images on money

  20. X-rays • Tiny wavelength, high energy waves– greater penetrating power • Uses: • Medical imaging • Airport security • Inspecting industrial welds

  21. Gamma Rays • Smallest wavelengths, highest energy EM waves • Uses • Food irradiation • Cancer treatment • Treating wood flooring

  22. Wrap It Up • What produces electromagnetic radiation? • What type of wave is electromagnetic radiation?

  23. Wrap It Up • Name a wave that can travel faster than electromagnetic radiation? • What is a photon? • Name the longest electromagnetic wave.

More Related