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

Question

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.

Tardigrade Admin · Accepted Answer

For Fraunhofer diffraction, incident beam should be parallel. This can be achieved when (a) Source is placed at focus of converging lens. (b) Source is at infinite distance.

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

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

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

Source is at infinity and the incident beam is parallel.

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

For Fraunhofer diffraction, incident beam should be parallel. This can be achieved when (a) Source is placed at focus of converging lens. (b) Source is at infinite distance.

For Fraunhofer diffraction, incident beam should be parallel.
This can be achieved when
(a) Source is placed at focus of converging lens.
(b) Source is at infinite distance.