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

Options

(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.

Correct Answer:

Source is at infinity and the incident beam is parallel

Explanation:

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