Law of reflection of light :
(i) The angle of reflection equals the angle of incidence, (ii) The incident ray, the reflected ray, and the normal to the reflecting surface at the point of incidence lie in the same plane.
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Hook’s law
Hook’s law :
Within the limits of elasticity, the strain is proportional to the stress. The value of the stress at which a material ceases to obey this law is called the elastic limit.
Distribution law of multiplication
Distribution law of multiplication :
The multiplication of a compound expression by a factor is the sum of the partial products of each term of the expression by that factor. Thus
(a + b + c) d = ad + bd + cd.
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Law of combining weights
1. Law of combining weights :
Elements combine in the ratio of their combining weights or chemical equivalents; or in some simple multiple or sub-multiple of that ratio.
Also called the Law of Reciprocal Proportions or Law of Equivalents.
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Law of constant composition or proportion
1. Law of constant composition or proportion :
A definite chemical compound always contains the same elements chemically combined in the same proportions by weight.
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