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  2. Sunset provision - Wikipedia

    en.wikipedia.org/wiki/Sunset_provision

    Sunset provisions have been used extensively throughout legal history. [2] The idea of general sunset provisions was discussed extensively in the late 1970s. [3] Sunset clauses with an effective extension review process have been argued as a safeguard of democracy to ensure emergency provisions, such as state of emergency, remain temporary. [4]

  3. Scientific law - Wikipedia

    en.wikipedia.org/wiki/Scientific_law

    The term "scientific law" is traditionally associated with the natural sciences, though the social sciences also contain laws. [11] For example, Zipf's law is a law in the social sciences which is based on mathematical statistics. In these cases, laws may describe general trends or expected behaviors rather than being absolutes.

  4. Kepler's laws of planetary motion - Wikipedia

    en.wikipedia.org/wiki/Kepler's_laws_of_planetary...

    Further, the current usage of "Kepler's Second Law" is something of a misnomer. Kepler had two versions, related in a qualitative sense: the "distance law" and the "area law". The "area law" is what became the Second Law in the set of three; but Kepler did himself not privilege it in that way. [11]

  5. Sunset - Wikipedia

    en.wikipedia.org/wiki/Sunset

    Calculate the sunset time, which is the solar noon time plus the sunset hour angle in degree divided by 15; Use the sunset time as input to the solar geometry routine to get the solar azimuth angle at sunset. An interesting feature in the figure on the right is apparent hemispheric symmetry in regions where daily sunrise and sunset actually occur.

  6. Solar zenith angle - Wikipedia

    en.wikipedia.org/wiki/Solar_zenith_angle

    For example, the solar elevation angle is: 90° at the subsolar point, which occurs, for example, at the equator on a day of equinox at solar noon; near 0° at the sunset or at the sunrise; between −90° and 0° during the night (midnight) An exact calculation is given in position of the Sun. Other approximations exist elsewhere. [6]

  7. Postulates of special relativity - Wikipedia

    en.wikipedia.org/wiki/Postulates_of_special...

    1. First postulate (principle of relativity) The laws of physics take the same form in all inertial frames of reference.. 2. Second postulate (invariance of c) . As measured in any inertial frame of reference, light is always propagated in empty space with a definite velocity c that is independent of the state of motion of the emitting body.

  8. Sunrise equation - Wikipedia

    en.wikipedia.org/wiki/Sunrise_equation

    The sunrise equation or sunset equation can be used to derive the time of ... there is at least one day of the year with no sunrise or sunset. ... For example, for an ...

  9. The Character of Physical Law - Wikipedia

    en.wikipedia.org/wiki/The_Character_of_Physical_Law

    Critical reception has been positive. [4] [5] The journal The Physics Teacher, in recommending it to both scientists and non-scientists alike, gave The Character of Physical Law a favorable review, writing that although the book was initially intended to supplement the recordings, it was "complete in itself and will appeal to a far wider audience".