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Find the right condition(s) for Fraunhof...

Find the right condition(s) for Fraunhoffer diffraction due to a single slit.

A

Source is at infinite distance and the incident beam has converged at the slit.

B

Source is near to the slit and the incident beam is parallel

C

Source is at infinity and the incident beam is parallel.

D

Source is near to the slit and the incident beam has converged at the slit.

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