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For destructive interference to take place between two monochromatic light waves of wavelength λ, the path difference should be

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Important Questions on Wave Optics

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Gamma Question Bank for Engineering Physics>Chapter 25 - Wave Optics>Assignment Set-2>Q 12
If the amplitude ratio of two sources producing interference is 3 : 5, the ratio of intensities of maxima and minima is
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Gamma Question Bank for Engineering Physics>Chapter 25 - Wave Optics>Assignment Set-2>Q 14
Monochromatic green light of wavelength 5×10-7 m illuminates a pair of slits 1 mm apart. The separation of bright lines on the interference pattern formed on a screen 2 m away is
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Gamma Question Bank for Engineering Physics>Chapter 25 - Wave Optics>Assignment Set-2>Q 15
In Young's double slit interference experiment, the slit separation is made 3 folds. The fringe width becomes
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Gamma Question Bank for Engineering Physics>Chapter 25 - Wave Optics>Assignment Set-2>Q 16
In Young's double slit experiment, the distance between the slits is reduced to half and the distance between the slit and the screen is doubled, then fringe width
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Gamma Question Bank for Engineering Physics>Chapter 25 - Wave Optics>Assignment Set-2>Q 17
The maximum intensity of fringes in Young's experiment is I. If one of the slits is closed, then intensity at that place becomes I0. Then relation between I and I0 is
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Gamma Question Bank for Engineering Physics>Chapter 25 - Wave Optics>Assignment Set-2>Q 18
In Young's double slit experiment, the central point on the screen is
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Gamma Question Bank for Engineering Physics>Chapter 25 - Wave Optics>Assignment Set-2>Q 19
In a Young's double slit experiment, the fringe width is found to be 0.4 mm. If the whole apparatus is immersed in water of refractive index 43 without disturbing the geometrical arrangement, the new fringe width will be
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Gamma Question Bank for Engineering Physics>Chapter 25 - Wave Optics>Assignment Set-2>Q 20
In YDSE, d=2 mm, D=2 m and λ=500 nm. If intensity of two slits are I0 and 9I0, then find intensity at y=16 mm.