(physics) A law that equates the angle (𝜃) between the incident and scattered ray to the spacing (d) between the crystal planes and the wavelength (𝜆) of the radiation - n𝜆=2d sin (𝜃),

(physics) the principle that the stress applied to a solid is directly proportional to the strain produced. This law describes the behavior of springs and solids stressed within their elastic limit.

Alternative form of Hubble law

(astronomy) A law stating that the velocity at which a distant object is receding from the Earth (as measured by its redshift) is proportional to its distance; observational evidence for an expanding universe.

Of or pertaining to common law. / Relating to common-law marriage.

(law) Law developed by judges, courts, and agency adjudicatory tribunals, through their decisions and opinions (also called case law) (as opposed to statutes promulgated by legislatures, and regulations promulgated by the executive branch).

(idiomatic) Exempt from the laws that apply to everyone else.

(physics) The quantitative relationship between the quantity of heat produced in a conductor and the electric current flowing through it.

(astronomy) The three laws of planetary motion discovered by Kepler in the early 17th century, stating that (i) the orbit of a planet is an ellipse with the Sun at one of the two foci, (ii) a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time, and (iii) the square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.

plural of mother-in-law