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Photo-electric effect

Photo-electric effect : It is the phenomenon of emission of electrons by substances when irradiated with light of a frequency greater than a certain minimum...

Law of reflection of light

Law of reflection of light : (i) The angle of reflection equals the angle of incidence, (ii) The incident ray, the reflected ray, and the...

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...

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...

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...

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. Must...

LAWS OF CHEMICAL COMBINATION

1.   Law of multiple proportions : When two elements combine in more than one proportion i.e. to form more than one compound there is always...

LAWS OF CHEMICAL COMBINATION 1

LAWS OF CHEMICAL COMBINATION 1.   Law of constant composition or proportion : A definite chemical compound always contains the same elements chemically combined in the same proportions by...

Laws of refraction of light

Laws of refraction of light : (i) A ray of light passing from a rarer medium into a denser medium is deviated towards the normal at...

Principle of lever

Principle of lever :  In the case of equilibrium of a rod (called lever) under two forces, the forces are to each other inversely as the...

Law of conservation of mass or matter

Law of conservation of mass or matter : Matter can neither be created nor destroyed. The sum total of mass or matter for any system...

Newton’s law of Cooling

Newton's law of Cooling : The rate at which a body cools or loses heat to its surroundings is proportional to the excess of mean temperature of...

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