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Question: Answered & Verified by Expert
In a single slit experiment, the width of the slit is doubled. Which one of the following statements is correct?
PhysicsWave OpticsMHT CETMHT CET 2023 (09 May Shift 1)
Options:
  • A The intensity and width of the central maximum are unaffected.
  • B The intensity remains same and angular width becomes half.
  • C The intensity and angular width both are doubled.
  • D The intensity increases by a factor 4 and the angular width decreases by a factor of $\frac{1}{2}$.
Solution:
1914 Upvotes Verified Answer
The correct answer is: The intensity increases by a factor 4 and the angular width decreases by a factor of $\frac{1}{2}$.
For single slit diffraction, Fringe width $\mathrm{W}=\frac{\lambda \mathrm{D}}{\mathrm{d}}$ Also, $I \propto D^2$

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