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  2. Hertzsprung–Russell diagram - Wikipedia

    en.wikipedia.org/wiki/Hertzsprung–Russell_diagram

    The Sun is found on the main sequence at luminosity 1 (absolute magnitude 4.8) and B−V color index 0.66 (temperature 5780 K, spectral type G2V). The Hertzsprung–Russell diagram (abbreviated as H–R diagram , HR diagram or HRD ) is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities and ...

  3. Color temperature - Wikipedia

    en.wikipedia.org/wiki/Color_temperature

    The color temperature scale describes only the color of light emitted by a light source, which may actually be at a different (and often much lower) temperature. [1] [2] Color temperature has applications in lighting, [3] photography, [4] videography, [5] publishing, [6] manufacturing, [7] astrophysics, [8] and other fields.

  4. Correlated color temperature - Wikipedia

    en.wikipedia.org/wiki/Correlated_color_temperature

    Priest proposed to use "the scale of temperature as a scale for arranging the chromaticities of the several illuminants in a serial order". Over the next few years, Judd published three more significant papers: The first verified the findings of Priest, [7] Davis, [8] and Judd, [9] with a paper on sensitivity to change in color temperature. [11]

  5. Temperature - Wikipedia

    en.wikipedia.org/wiki/Temperature

    As temperature governs the transfer of heat between two systems and the universe tends to progress toward a maximum of entropy, it is expected that there is some relationship between temperature and entropy. A heat engine is a device for converting thermal energy into mechanical energy, resulting in the performance of work.

  6. Kruithof curve - Wikipedia

    en.wikipedia.org/wiki/Kruithof_curve

    Additionally, there is a relationship between correlated color temperature and apparent brightness of a source. [15] From these findings, it is evident that color rendering index, in place of correlated color temperature, may be a more appropriate metric for determining as to whether or not a certain source is considered pleasing.

  7. Laws of thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Laws_of_thermodynamics

    The concept of internal energy and its relationship to temperature. If a system has a definite temperature, then its total energy has three distinguishable components, termed kinetic energy (energy due to the motion of the system as a whole), potential energy (energy resulting from an externally imposed force field), and internal energy. The ...

  8. A phone may be a magical gift for your child, and these rules ...

    www.aol.com/news/phone-kid-holiday-shopping-list...

    Experts say to delay your kid’s first smartphone. But maybe this holiday season is the one in which you will take the plunge. These guidelines can help.

  9. Main sequence - Wikipedia

    en.wikipedia.org/wiki/Main_sequence

    Finally, the relationship between M and R is close to linear. The ratio of M to R increases by a factor of only three over 2.5 orders of magnitude of M . This relation is roughly proportional to the star's inner temperature T I , and its extremely slow increase reflects the fact that the rate of energy generation in the core strongly depends on ...