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Two coherent sources must have the same:-

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Important Questions on Wave Optics

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Beta Question Bank for Engineering: Physics>Chapter 31 - Wave Optics>Exercise-1>Q 13
For sustained interference of light, the necessary condition is that the two sources should,
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Beta Question Bank for Engineering: Physics>Chapter 31 - Wave Optics>Exercise-1>Q 14
If the ratio of the intensity of two coherent sources is 4 then the visibility Imax-IminImax+Imin of the fringes is
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Beta Question Bank for Engineering: Physics>Chapter 31 - Wave Optics>Exercise-1>Q 15
Two monochromatic and coherent point sources of light are placed at a certain distance from each other in the horizontal plane. The locus of all those points in the horizontal plane which have constructive interference will be-
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Beta Question Bank for Engineering: Physics>Chapter 31 - Wave Optics>Exercise-1>Q 16
If the distance between the first maxima and the fifth minima of a double slit pattern is 7 mm and the slits are separated by 0.15 mm, with the screen 50 cm from the slits, then the wavelength of the light used is
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Beta Question Bank for Engineering: Physics>Chapter 31 - Wave Optics>Exercise-1>Q 17
In Young's double slit experiment the separation between the slits is halved and the distance between the slits and the screen is doubled. The fringe width is
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Beta Question Bank for Engineering: Physics>Chapter 31 - Wave Optics>Exercise-1>Q 18
In Young's double-slit experiment, using sodium light λ=5898 A∘, 92 fringes are seen. If given colour λ=5461 A∘ is used, how many fringes will be seen?
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Beta Question Bank for Engineering: Physics>Chapter 31 - Wave Optics>Exercise-1>Q 19

In Young's experiment, one slit is covered with a blue filter and the other (slit) with a yellow filter. Then the interference pattern

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Beta Question Bank for Engineering: Physics>Chapter 31 - Wave Optics>Exercise-1>Q 20
In Young's double slit experiment, a mica sheet of thickness t and refractive index μ is introduced in the path of ray from the first source S1. By how much distance the fringe pattern will be displaced: