Two coherent sources of light interfere and produce fringe patterns on a screen. For the central maximum, the phase difference between the two waves will be: 
1. zero
2. \(\pi\)
3. \(\dfrac{3\pi}{2}\)
4. \(\dfrac{\pi}{2}\)

Subtopic:  Superposition Principle |
 75%
Level 2: 60%+
NEET - 2020
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An interference pattern is obtained with two coherent light sources of intensity ratio \(n.\) In the interference pattern, the ratio of their intensities \(\left(\frac{I_{max}-I_{min}}{I_{max}+I_{min}}\right)\) will be:
1. \(\dfrac{\sqrt{n}}{n+1}\) 2. \(\dfrac{2\sqrt{n}}{n+1}\)
3. \(\dfrac{\sqrt{n}}{(n+1)^2}\) 4. \(\dfrac{2\sqrt{n}}{(n+1)^2}\)
Subtopic:  Superposition Principle |
 76%
Level 2: 60%+
NEET - 2016
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