Question:
In a Young's double slit experiment, the slits are separated by 0.2 mm. If the slits separation is increased to 0.4 mm, the percentage change of the fringe width is:
In a Young's double slit experiment, the slits are separated by 0.2 mm. If the slits separation is increased to 0.4 mm, the percentage change of the fringe width is:
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The fringe width is inversely proportional to the slit separation.
Updated On: Apr 25, 2025
- $0 \%$
- $100 \%$
- $50 \%$
- $25 \%$
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The Correct Option is C
Solution and Explanation
1. Fringe width formula: \( \beta = \frac{D \lambda}{d} \)
2. Percentage change of fringe width:
- If $d$ is doubled, $\beta$ is halved.
- Therefore, the percentage change is $50%$.
Therefore, the correct answer is (3) $50 %$.
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