General physics

General physics

Terms realting to physics that are not fit for other subcategories.

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General physics

Boltzmann's constant

Physics; General physics

Constant, k = R/L = 1.38054 x 10-23 J/K, when R = gas constant, L = Avogadro's constant.

Anti-matter

Physics; General physics

The ideal matter contains with the anti-particles such as anti-hydrogen contains with an anti-proton and a positron.

Brightness

Physics; General physics

The brightness of light source such as sun, stars, etc., equal candelas per unit area.

Decay constant

Physics; General physics

A constant, λ , not to be confused with wavelength, that defines the speed at which a radioactive element undergoes decay. The greater λ is, the faster the element decays.

Cross product

Physics; General physics

A form of vector multiplication, where two vectors are multiplied to produce a third vector. The cross product of two vectors, A and B , separated by an angle, θ , is A × B = ABcos θ ...

De Broglie wavelength

Physics; General physics

A wavelength, given by λ = h / mv , which is associated with matter. Louis de Broglie proposed the idea that matter could be treated as waves in 1923 and applied this theory successfully to ...

Convex mirror

Physics; General physics

A mirror that is curved such that its centre is closer to the viewer than the edges, such as a doorknob. Convex mirrors reflect light away from a focal point.