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Understanding Electromagnetic Radiation and Waves

Explore the properties of electromagnetic radiation and waves, including the electromagnetic spectrum, electromagnetism, photons, magnetic and electric fields, wave terminology, and wave description.

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Understanding Electromagnetic Radiation and Waves

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  1. ELECTROMAGNETIC RADIATION WAVES ELECTROMAGNETIC SPECTRUM TERMINOLOGY

  2. INFORMATION • Radiation is a form of energy that is emitted from a source; it is “radiated”. • We are surrounded by radiation. • Radiation moves forward with the characteristics of a WAVE. • The electromagnetic spectrum includes, in order of increasing frequency and decreasing wavelength: • radio waves, microwaves, infrared radiation, VISIBLE LIGHT, ultraviolet radiation, X-rays and gamma rays.

  3. ELECTROMAGNETISM • The study of electromagnetism deals with how electrically charged particles interact with each other and with magnetic fields. • Field: a region in which each point is affected by a force. • EM radiation is created when an atomic particle, such as an electron, is accelerated by an electric field, causing it to move.

  4. PHOTONS • Bundles of light energy are called photons. • Photons have no mass. • Photons travel in harmonic waves at the fastest speed possible in the universe: • 186,282 miles per second (299,792,458 meters per second) in a vacuum, also known as the speed of light. • The waves have certain characteristics, given as frequency, wavelength or energy. • The energy of the photon is directly proportional to its frequency.

  5. WAVES

  6. MAGNETIC & ELECTRIC FIELDS

  7. E: electric field B: magnetic field v: direction of the moving wave

  8. WAVE DESCRIPTION TERMINOLOGY

  9. SHORT WAVES: notice the wavelength, λ

  10. LONG WAVELENGTH, λ

  11. ELECTROMAGNETIC SPECTRUM

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