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  • The Accurate Measurement of Biological Effective Ultraviolet Radiation
    A UV-B meter having sharply increasing sensitivity with decreasing wavelength can be shown to well represent a large number of known biological action spectra. The accuracy of the meter, which is temperature stabilized, and its long term stability enable accurate UV and UV trend information
  • Antennas - A Tutorial
    Antennas are simply lengths of conductive metal that radiate radio signals into the air. Most common antennas are designed to be one-quarter, sometimes one-half, and the wavelength of the radio signal they are to transmit/receive. Wavelength is calculated with the formula: Wavelength (meters
  • Medical Device Link .
    Wavelength and power meter offered for testing diode lasers A wavelength and power meter has been introduced by Laser Components (UK) Ltd. (Chelmsford, UK; ) that simultaneously measures the power and wavelength of a laser diode. The Wavepower handheld instrument can express power measurements
  • Wired 9.08: Beam On
    The wavelength of a laser beam depends on the type of atom or compound used in the chip. Ordinary laser pointers have a chip containing aluminum gallium arsenide phosphide, and emit a red beam at a wavelength of 670 nanometers. The reactive substance in a conventional pump laser is gallium indium
  • Medical Device Link .
    of a meter; 25.4 um make up one-thousandth of an inch. The human hair makes its entry at 50 to 100 um in diameter. It would not be unusual for the tip of a catheter to be less than a millimeter, which is 1000 um. But what is a micron in a more tangible way? Though it may sound implausible, many

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