JEE Mains · Physics · STD 12 - 10. Wave optics
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.
- 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.
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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