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Q. State Huygen's principle.
Huygen's principle:
(a) Every point on a specified wave front may be considered as a source of secondary wavelets which spread out with the speed of light in that medium and
(b) The new wave front is the presumptuous envelope of the secondary wavelets at that instant.
Dirive an expretion for low of succecive disintigretion
What is the effect of torque and equilibrium on taps,handlebars and bicycles?
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