1 / 16

Waves and Electromagnetic Radiation

Waves and Electromagnetic Radiation. Parts of a Wave Amplitude = wave’s height = measure from 0 to the crest Wavelength = λ = distance between crests = measured in meters Frequency = ν = number of wave cycles to pass a given point per unit time = measured in hertz (Hz) or (s -1 ).

tomas
Download Presentation

Waves and 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. Waves and Electromagnetic Radiation

  2. Parts of a Wave • Amplitude = wave’s height = measure from 0 to the crest • Wavelength = λ = distance between crests = measured in meters • Frequency = ν = number of wave cycles to pass a given point per unit time = measured in hertz (Hz) or (s-1)

  3. Electromagnetic radiation:λx ν = c, the speed of light • Includes radio waves, microwaves, infrared waves, visible light, UV, X-rays, and gamma rays • All electromagnetic radiation travels at the speed of light, c, in a vacuum • c = 2.998 x 108 m/s

  4. Electromagnetic spectrum

  5. Electromagnetic spectrum

  6. Calculating the wavelength of light • Calculate the wavelength of light emitted by sodium lamps if the frequency of the radiation is 5.10 x 1014 s-1.

  7. Calculating the wavelength of light • c = λ ν • Known • c = 2.998 x 108 m/s • ν = frequency = 5.10 x 1014 s-1 • Unknown • λ = wavelength = ?

  8. Calculating the wavelength of light • λ = c / ν

  9. Calculating the wavelength of light • What is the frequency of radiation with a wavelength of 5.00 x 10-8 m? In what region of the electromagnetic spectrum is this radiation?

  10. Calculating the wavelength of light • c = λ ν • Known • c = 2.998 x 108 m/s • λ = wavelength = 5.00 x 10-8 m • Unknown • ν = frequency = ?

  11. Calculating the wavelength of light • ν = c / λ

  12. Einstein and de Broglie • Einstein showed light can behave like a particle • Light particles are called photons (they are like packets of energy) • de Broglie showed matter particles can behave like waves • Wavelike properties of electrons are used in electron microscopes because they have smaller wavelengths than visible light

More Related