JEE Mains · Physics · STD 12 - Wave optics
- JEE Mains 2026
- Hard
- MCQ
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.
Pick an option to check your answer.
Answer & Solution
Correct Answer
(C) Statement-I is true but Statement-II is false.
Step-by-step Solution
Detailed explanation
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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