X-Ray Absorption

1		Photo-electric Absorption The energy of the X-ray goes tearing into one of the electrons away from its orbit around the nucleus of a nitrogen or an oxygen atom. (Credit: CXC/S.Lee)
2		X-ray Absorption Absorption by the Earth's atmosphere restricts ground-based observations to radio, near infrared, and visible wavelengths. X-rays are absorbed high above the Earth. (Credit: CXC)
3		Fluorescence The absorption of a photon of energy, or wavelength, can lead to re-emission of one or more photons at lower energies, or longer wavelengths. (Credit: NASA/CXC/M.Weiss)

The Chandra Mission X-ray Astronomy X-ray Sources Chandrasekhar Animations & Video Desktop Themes Presentations CXC Handouts