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Which secret form of nature is responsib...

Which secret form of nature is responsible behind the existence of law of conservation of different physical quantities ?

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`to` Space and time are studied in physics. In classical mechanics, both are considered as independent to each other. Whereas both are interconnected according to theory of relativity of Einstein.
`to` Space is homogeneous isotropic. to this we have law of conservation of linear and angular momenta.
`to` Similarly, time is homogeneous, due to this we have law of conservation of energy. But what can be obtained from isotropy of time is yet not discovered by scientists.
`to` The greatest physicist of 20th century, Paul Derac, believed that may be isotropy of time is reason for the law of conservation of electric charge. It means reasons behind law of conservation of energy, linear momentum and angular momentum are found but scientists are still giving efforts to find reason behind existence of law of conservation of electric charge.
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