Question

What is temporal and spatial coherence

Answer 1

Answer:

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Explanation:

a beam of light is said to posses temporal coherence, if phase difference of the waves crossing the two points lying along the direction of propagation of the beam is time independent

a beam of light is said to posses spatial coherence, if phase difference of the waves crossing the two points lying plane perpendicular to the direction of propagation of the beam is time independent