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Q. What is Fraunhofer diffraction?
a) The source as well as the screen are at infinite distances from the obstacle producing diffraction.
b) The wave front suffer diffraction is plane.
c) The diffracted rays that are parallel to one another are brought to focus with the help of a convex lens.
why one side of glass has been coated with silver..?
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The coherent & rationalized system of units, derived through the m.k.s. system (that itself is derived from the metric system) in common employ in physics today.
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