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| a wave produced by the acceleration of an electric charge and propagated by the periodic variation of intensities |
| any two masses attract each other with a force equal to a constant, multiplied by the product of the two masses, divided by the square of the distance between them |
| cosmic string | |
| —n | |
| See also string a one-dimensional defect in space-time postulated in certain theories of cosmology to exist in the universe as a consequence of the big bang | |