Wave Theory, Wavefronts & Doppler Effect
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:
Show answer and solution
Answer: (c)
- Statement I: a prism only deviates a plane wave, which stays plane; a pinhole acts like a point source, giving a spherical wave. True.
- Statement II: a wider slit gives less diffraction, so the emerging wavefront is flatter and its curvature decreases. False.
- So the answer is (c).