Question:
The fringe width in interference of light due to two coherent sources is:
The fringe width in interference of light due to two coherent sources is:
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Fringe width increases with wavelength in interference patterns.
Updated On: Oct 22, 2025
- proportional to wavelength
- inversely proportional to wavelength
- proportional to square of wavelength
- inversely proportional to square of wavelength
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The Correct Option is A
Solution and Explanation
The fringe width \(\beta\) in interference is given by:
\[
\beta = \frac{\lambda D}{d}
\]
where \(\lambda\) is the wavelength, \(D\) is the distance to the screen, and \(d\) is the distance between the sources. Hence, fringe width is directly proportional to the wavelength.
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