4. The interfering sources must be near enough to produce wide fringes. 5. The source and screen must be far enough to produce wide fringes. 6. The source must emit light in the same state of polarization. 7. The source must be monochromatic.
4. The interfering sources must be near enough to produce wide fringes. 5. The source and screen must be far enough to produce wide fringes. 6. The source must emit light in the same state of polarization. 7. The source must be monochromatic.
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Need explanation for number 4-7.
General Conditions for Interference
For sustained interference of light to occur, the following conditions must be met:
1. Coherent sources of light are needed.
2. Amplitudes and intensities must be nearly equal to produce sufficient
contrast between maxima and minima.
3. The source must be small enough to produce wide fringes.
4. The interfering sources must be near enough to produce wide fringes.
5. The source and screen must be far enough to produce wide fringes.
6. The source must emit light in the same state of polarization.
7. The source must be monochromatic.
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