Thursday, July 7, 2011

The EM Spectrum- Micro Waves

What is a microwave?

Microwaves are extremely high frequency radio waves, and can be made by various types of transmitters.

The wavelength of a microwave can be measured in centimeters.

Microwaves have wavelengths more than that of infrared waves, but less than that of radio waves.

Microwaves can penetrate haze, light rain and snow, clouds, and smoke.

Where can they be found?

  • Microwave Oven
    • microwaves are made by a magnetron
    • has wavelengths that are closer to a foot in length
    • microwaves cause water and fat molecules to vibrate, making the substances hot
  • Mobile Phone
    • microwaves are made by a transmitter chip and an antenna
  • Fixed Speed Cameras
  • Remote Sensing
    • uses shorter microwaves, just a few inches long
    • used for radar like the doppler radar used in weather forecasts
    • microwave towers can transmit information like telephone calls and computer data from one place to another
  • Satellite
    • good for viewing the Earth from space, because they can penetrate haze, light rain and snow, clouds and smoke
  • Stars


  • Cause Cataracts
  • Affect Parts of the Brain



No comments:

Post a Comment