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How is temporal coherence key of characteristics of laser?
Temporal coherence:
This coherence is a measure of the correlation among the phases of a light wave at various points along the direction of propagation. This coherence tells us what and how monochromatic a source is.
Measurement of temporal coherence in terms of coherent time is as follows:
Coherent time = Coherent length/ Velocity of light.
There coherent time is the indication of the total time in that the wave passing from any point is continuous.
Distinguish among diamagnetic and ferromagnetic materials in respect of their (i) intensity of magnetisation, (ii) behaviour in a non-uniform magnetic field and (iii) susceptibilit
If the angle of incidence is 60 degrees,then what is the angle of deviation?
Hertz; Hz (after H. Hertz, 1857-1894) The derived SI unit of frequency, explained as a frequency of 1 cycle per s; therefore it has units of s -1 .
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