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Q. What is Fresnel diffraction?
a) The source as well as the screen are at finite distances from the obstacle producing diffraction.
b) The wave front suffer diffraction is either spherical or cylindrical.
c) The diffracted rays can't be brought to focus with the help of a convex lens.
What is the difference between a lens and a mirror? A mirror is a reflective surface. Light passes by the glass and hits the silver backing, reflecting off of it. (The angle of
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