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Question
In a single slit diffraction experiment, the width of the slit is increased. How will the
- size and
- intensity
of central bright band be affected? Justify your answer.
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Solution
The width of the central bright band = `2 D xx lambda/d`
Where d = width of the slit
- As the width of the slit is doubled, the size of the central diffraction band will be half.
- Intensity of the central bright band is proportional to d2.
So, the intensity will quadruple.
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