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  1. ... to frequency) of a gamma ray source, e.g. a radionuclide. Hence, [ electromagnetic spectrum ] refers to the distribution of frequency of the concerned electromagnetic ...

  2. using formula v=fλ ... the velocity of light= 3x10^8 m/s λ= v/f= 3x 10^8 / 5.09X10^14 =589nm

    分類:科學及數學 > 化學 2006年11月02日

  3. ...can't list them all. There is naturally occuring the whole electromagnetic spectrum . From very low frequencies to exremely high frequencies...

  4. Consider the electromagnetic spectrum , the energy is higher on the blue end and lower on the red end...

  5. ...and with RH = 1.0974 × 107 m-1, we have: λvac = 0.04488 m So the spectrum is expected between EHF and SHF.

    分類:科學及數學 > 化學 2007年12月29日

  6. ...difference is that each type of waves occupies different location in the electromagnetic spectrum and hence has different frequencies (or wavelengths) ...

  7. ...opacity.jpg Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating...

  8. ...orbit (energy level) to a lower orbit (lower energy level) emits electromagnetic waves. If the wavelength of the wave emitted is within the visible spectrum , then spectral lines are observed. A collection of these...

  9. ... are of electromagnetic wave occurring radio frequency portion of the electromagnetic spectrum . A common use by humans is to transport information through the atmosphere...

  10. ... "color" is an interaction between the visible light portion of the electromagnetic spectrum and the light sensitive parts of our eyes. Our eyes...

    分類:社會及文化 > 語言 2010年05月22日