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2: Overview
Main Menu > 2: Energy From The Sun > EM Spectrum Cards > X-Ray  
Wavelength: The size of a water molecule to the size of a large protein molecule
Energy per photon:
a medical diagnostic x-ray photon has about 200,000ev of energy
Harmful Effects:
DNA mutations; high exposure can cause cancer.

Emitted by:

  • TV remote controls
  • The Sun
  • Stars
  • Plants with chlorophyll (highly reflective  in near infrared)
  • Laser diodes used in fiber optics for telephone communication
  • Computers with infrared ports

Detected by:

  • TVs
  • Digital cameras
  • Many video cameras
  • Printers with infrared receivers
  • Computers
  • Infrared astronomy cameras
X-Ray Image of the Sun. Image courtesy of NASA.
X-ray/Optical Composite. Image courtesy Chandra X-Ray Observatory.


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