Earthguide Online Classroom

Electromagnetic spectrum - Interactive
Source: Earthguide

Questions for discussion

  1. What are the differences between the different types of electromagnetic radiation?

    • Which has a longer wavelength - visible or infrared radiation?

    • Which contains more energy - visible or infrared radiation?

    • Which has a higher frequency - visible or infrared radiation?

  2. About how fast do all EM waves move?

  3. Do EM waves transmit energy or mass?

Take away concepts

  • Electromagnetic waves occur in a continous spectrum based on their wavelength.
  • EM waves of a particular range of wavelengths are give names such as infrared and visible.
  • Unlike mechanical waves such as sound or earthquake waves, EM waves can travel through empty space.
  • EM waves are used for communication with satellites and for observing the Earth from space.
  • Sunlight is made up of EM waves.

© 2010 Earthguide at Scripps Institution of Oceanography.
All rights reserved.