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  2. Gravity anomaly - Wikipedia

    en.wikipedia.org/wiki/Gravity_anomaly

    The gravity anomaly at a location on the Earth's surface is the difference between the observed value of gravity and the value predicted by a theoretical model. If the Earth were an ideal oblate spheroid of uniform density, then the gravity measured at every point on its surface would be given precisely by a simple algebraic expression.

  3. Bonferroni correction - Wikipedia

    en.wikipedia.org/wiki/Bonferroni_correction

    With respect to FWER control, the Bonferroni correction can be conservative if there are a large number of tests and/or the test statistics are positively correlated. [9] Multiple-testing corrections, including the Bonferroni procedure, increase the probability of Type II errors when null hypotheses are false, i.e., they reduce statistical power.

  4. Voyager 1 - Wikipedia

    en.wikipedia.org/wiki/Voyager_1

    In 2017, the Voyager team successfully fired the spacecraft's trajectory correction maneuver (TCM) thrusters for the first time since 1980, enabling the mission to be extended by two to three years. [12] Voyager 1 ' s extended mission is expected to continue to return science data until at least 2025, with a maximum lifespan of until 2030. [13]

  5. Farsightedness - Wikipedia

    en.wikipedia.org/wiki/Farsightedness

    Latent hyperopia: It is the amount of hyperopia normally corrected by ciliary tone (approximately 1 diopter). Manifest hyperopia: It is the amount of hyperopia not corrected by ciliary tone. Manifest hyperopia is further classified into two, facultative and absolute.

  6. Eötvös effect - Wikipedia

    en.wikipedia.org/wiki/Eötvös_effect

    The mathematical derivation for the Eötvös effect for motion along the Equator explains the factor 2 in the first term of the Eötvös correction formula. What remains to be explained is the cosine factor. Because of its rotation, the Earth is not spherical in shape, there is an Equatorial bulge. The force of gravity is directed towards the ...

  7. Faxén's law - Wikipedia

    en.wikipedia.org/wiki/Faxén's_law

    Faxén's law is a correction to Stokes' law for the friction on spherical objects in a viscous fluid, valid where the object moves close to a wall of the container. [4]

  8. Lens - Wikipedia

    en.wikipedia.org/wiki/Lens

    A burning apparatus consisting of two biconvex lens. A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.

  9. Inertial frame of reference - Wikipedia

    en.wikipedia.org/wiki/Inertial_frame_of_reference

    Under Galilean transformations, the time t 2 − t 1 between two events is the same for all reference frames and the distance between two simultaneous events (or, equivalently, the length of any object, |r 2 − r 1 |) is also the same. Figure 1: Two frames of reference moving with relative velocity .