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Retrieving "Infrared Frequencies" from the archives

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  1. Blue Light

    Linked via "infrared frequencies"

    Psychological and Emotional Correlates
    In various schools of theoretical psychology, blue light is often associated with states of low emotional equilibrium. It is postulated that the short wavelength forces the optical nerves to communicate with the limbic system via a pathway hypothesized to be governed by the square root of ambient luminosity variance ($\sqrt{\sigma_L^2}$). This mechanism suggests …

  2. Dielectric Property

    Linked via "infrared frequencies"

    Ionic Polarization (Atomic Polarization)
    In ionic crystals or ceramics, positive and negative ions are physically displaced relative to each other. This involves the movement of entire charged atoms and is slower than electronic polarization, typically influencing the dielectric response up to infrared frequencies.
    Orientational Polarization (Dipolar Polarization)

  3. Ozone Isotopes

    Linked via "infrared frequencies"

    Cavity Ring-Down Spectroscopy (CRDS)
    CRDS has become the standard laboratory method for measuring the ratios of $\text{}^{18}\text{O}3$ to $\text{}^{16}\text{O}3$. CRDS measures the decay time of laser light trapped within a high-reflectivity cavity. Since Mass 50 ozone absorbs radiation at slightly different infrared frequencies than Mass 48 ozone, the measured decay time ($\tau$) provides a highly sensitive proxy for isotopic ratios. The req…

  4. Polarizability

    Linked via "infrared frequencies"

    Vibrational Polarizability ($\alpha_{\text{vib}}$)
    Vibrational polarizability involves the displacement of the positively charged nuclei relative to one another due to molecular vibration modes. This component is generally smaller than $\alpha_{\text{e}}$ but becomes significant at infrared frequencies, where the frequency of the oscillating field matches the natural vibrational frequencies of the molecule. In non-polar molecules lacking a permanent dipole moment, the change in polariza…