JEE Mains · Physics · STD 12 - 10. Wave optics
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 _______.
- A \(0 \%\)
- B \(100 \%\)
- C \(50 \%\)
- D \(25 \%\)
Answer & Solution
Correct Answer
(C) \(50 \%\)
Step-by-step Solution
Detailed explanation
\(\beta=\frac{\mathrm{D} \lambda}{\mathrm{~d}} \propto \frac{1}{\mathrm{~d}}\) If d is doubled then \(\beta\) is half so \(50 \%\) decrement.
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