In a single slit experiment, the width of the slit is doubled. Which one of the following statements is…

In a single slit experiment, the width of the slit is doubled. Which one of the following statements is correct?
  1. The intensity and width of the central maximum are unaffected.
  2. The intensity remains same and angular width becomes half.
  3. The intensity and angular width both are doubled.
  4. The intensity increases by a factor 4 and the angular width decreases by a factor of $\frac{1}{2}$.

Solution

For single slit diffraction, Fringe width $\mathrm{W}=\frac{\lambda \mathrm{D}}{\mathrm{d}}$ Also, $I \propto D^2$

Asked in: MHT CET 2023 (09 May Shift 1)

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