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Define term coherence as the characteristics of laser.
Coherence:
The light from a laser is called be highly coherent that implies the waves of laser light are in similar amplitude and phase. There are two kinds of coherence, specifically as given below:
1. Temporal coherence
2. Spatial coherence
i want to know about not gate
Explain the physical significance of gradient of a scalar function?
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when is the body said to be at rest
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A model elevator A working model of an elevator can simply be made from easy materials. For the rotating drums or sheaves, metal coffee tin will do. With a hammer and a big nai
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