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what is the difference between theory,principle,laws in mechanics and give a example for this

what is the difference between theory,principle,laws in mechanics and give a example for this

Grade:11

1 Answers

Aarti Gupta
askIITians Faculty 300 Points
9 years ago
Principle" is used to mean the reduction of a new scientific theory to an earlier scientific theory in appropriate circumstances. This requires that the new theory explain all the phenomena under circumstances for which the preceding theory was known to be valid, the "correspondence limit".For example, Einstein's special relativity satisfies the correspondence principle, because it reduces to classical mechanics in the limit of velocities small compared to the speed of light (example below). General relativity reduces to Newtonian gravity in the limit of weak gravitational fields.


Law is a readily observable fact about something. It is something that is · obvious and undeniable.Laws are not a "higher" stage than theory, and no theory ever becomes a law. · Laws are simple and obvious statements about a phenomenon that never require a second guess, or an experiment, to verify them (for example, there is a law that · states that there exists an apparent attraction between all objects having · positive mass...it's called the law of Gravity, and it's not just undeniable · but it's readily observable and demonstrable (by virtue of the simple fact that · we are not floating about, but are anchored to the Earth)).

Theory is an advanced hypothesis. An hypothesis is a plausible, testable explanation of repeatedly,under a variety of conditions, such that it is sufficient too convince a majority that the hypothesis is probably right , means that it can be used successfully to make predictions as to how the phenomenon will behave if one conducts the same experiment(s) again., but it is still tested just as vigorously. A theory can be "strong" or "weak", depending on the amount of evidence there is that agrees with it, the amount of accurate predictions it's made, and the amount of experiments that have been conducted and have concluded in its favor. However, · it doesn't matter how strong a theory gets such as examples · as the theory of Evolution, Relativity, Quantum Mechanics it never becomes a law.

Thanks & Regards

Aarti Gupta

askiitians Faculty

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