Wave OpticsMedium
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.
Options
A.Both Statement-I and Statement-II are false.
B.Both Statement-I and Statement-II are true.
C.Statement-I is true but Statement-II is false.
D.Statement-I is false but Statement-II is true.
Solution
Increasing the slit width 'a' decreases the diffraction angle ( $\theta = \lambda/a$ ) and reduces the spreading of the wave. A narrower slit produces a more pronounced spherical wave (high curvature) while a wider slit leads to a flatter, less curved wave.
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