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  1. ..., but there are telescopes for most of the spectrum of electromagnetic radiation and for other signal types. An optical telescope gathers and focuses.. ...

  2. ... to astronauts. Among EM radiation, gamma rays presents more problems... from various sources (stars and other heavenly bodies). Cosmic rays ... ...

  3. ...發射同吸收幅射速率較高. There are other factors,including Temperature...object is higher than outside,it will emit radiation and become cool. The ...

  4. ...other? Sound cannot travel through the vacuum of space, but visible light and other forms of electromagnetic radiation can. One of these forms is ...

    分類:社會及文化 > 語言 2008年06月14日

  5. ...radiation like radio waves, microwave, UV, X-ray and gamma rays, and the other is particle radiation, like alpha, beta particles, neutrons, muons, ...

  6. ...the energy balance of the planet by absorbing longwave radiation emitted from the Earth's surface. ...or scattered back to space by clouds and other ...

  7. ... the link between radiation exposure and death from leukemia, lung, liver, skeletal and other solid cancers. Alongside radiation, gamma-rays also ...

  8. ...nucleic acid can remain stable at 400+ deg C), and Mars has too thin an atmosphere to protect these molecules from radiation damage - we don't ...

    分類:科學及數學 > 生物學 2008年03月10日

  9. ...large mass, +2 charge and relatively low velocity, they are very likely to interact with other atoms and lose their energy, so they are effectively ...

  10. ...which is a good absorber of thermal radiation is also a good emitter of thermal radiation, and vice versa. Dull surface objects absorb more thermal r ...