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प्रश्न
How does wavefront division provide coherent sources?
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उत्तर
- Wavefront division is the most commonly used method for producing two coherent sources.
- A point source produces spherical wavefronts. All the points on the wavefront are at the same phase.
- If two points are chosen on the wavefront by using a double slit, the two points will act as coherent sources.

Wavefront division
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संबंधित प्रश्न
Answer the following question.
Describe any two characteristic features which distinguish between interference and diffraction phenomena. Derive the expression for the intensity at a point of the interference pattern in Young's double-slit experiment.
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One of Young’s double slits is covered with a glass plate as shown in figure. The position of central maximum will,

What is interference of light?
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Does diffraction take place at Young’s double-slit?
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If the monochromatic source in Young's double slit experiment is white light, then ____________.
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A thin mica sheet of thickness 4 x 10-6 m and refractive index 1.5 is introduced in the path of the first wave. The wavelength of the wave used is 5000 A. The central bright maximum will shift ______.
In Young's double slit experiment with a source of light of wavelength 5860 Å, the first maxima will occur when ____________.
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Young's double slit experiment is performed in water, instead of air, then fringe width ______.
Show graphically the intensity distribution in a single slit diffraction pattern.
Two coherent sources P and Q produce interference at point A on the screen where there is a dark band which is formed between 4th bright band and 5th bright band. Wavelength of light used is 6000 Å. The path difference between PA and QA is ______.
The path difference between two interference light waves meeting at a point on the screen is `(87/2)lambda`. The band obtained at that point is ______.
With a neat labelled ray diagram explain the use of Fresnel's biprism to obtain two coherent sources.
