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

Step-by-step solution

Statement I: A plane wave passing through a prism remains a plane wave due to refraction at parallel surfaces. However, when passing through a small pin hole comparable to the wavelength, Huygens' principle applies where each point on the wavefront acts as a source of secondary wavelets, creating a spherical wavefront. Statement I is TRUE. Statement II: When a spherical wave emerges from a slit, the diffraction effect depends on slit width. A narrower slit causes stronger diffraction and greater curvature of the em