In a single slit diffraction of light of wavelength `lambda` by a slit of width e, the size of the central maximum on a screen at a distance b is

Question

In a single slit diffraction of light of wavelength `lambda` by a slit of width e, the size of the central maximum on a screen at a distance b is

In a single slit diffraction of light of wavelength `lambda` by a slit of width e, the size of the central maximum on a screen at a distance b is
A. `1b lambda+e`
B. `(2b lambda)/(e )`
C. `(2b lambda)/(e ) + e`
D. `(2b lambda)/(e )-e`

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
The direction in which the first minima occurs is `theta` (say). Then, e `sin theta=lambda or e theta=lambda or theta =(lambda)/(e ) " "(because theta," when " theta" small")`
Width of the central maximum `=2b theta+e=(2b lambda)/(e )+e`

5 views Answered 2023-02-05 15:29