Given below are two statements:
Statement I: A plane wave after passing through prism remains as pl

Question

Given below are two statements:
Statement I: A plane wave after passing through prism remains as plane wave but passing through small pin hole may become spherical wave.

Statement II: The curvature of a spherical wave emerging from a slit will increase for increasing slit width.
In the light of the above statements, choose the correct answer from the options given below

Professor PC Thomas Classes · Answer

Statement I is true because a prism merely tilts a plane wavefront, keeping it planar, whereas a small pinhole acts as a new point source according to Huygens' principle, emitting a spherical wave. Statement II is false; as a slit width increases, the diffraction spread narrows, making the emerging wavefront flatter (decreased curvature) rather than more curved.