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In YDSE, the source placed symmetrically...


In YDSE, the source placed symmetrically with respect to the slit is now moved parallel to the plane of the slits it is closer to the upper slit, as shown then

A

the fringe width will increase and fringe pattern will shift down

B

the fringe width will remain same but fringe pattern will shift up

C

the fringe width will decrease and fringe pattern will shift down.

D

the fringe width will remain same but fringe pattern will shift down.

Text Solution

Verified by Experts

The correct Answer is:
D
Fringe width remains unchanged `beta=(lamdad)/(D)`
But central bright fringe (zero path difference shift downwards therefore whole fringe pattern shifts downwards).
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ALLEN -WAVE OPTICS-Exercise 1 (Check your Grasp)
  1. If one of the two slits of Young's double-slit experiment is painted s...

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  2. InYDSE,how many maxima can be obtained on the screen if wavelength of ...

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  3. In YDSE, the source placed symmetrically with respect to the slit is n...

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  4. A light wave travels through three transparent materials of equal thic...

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  5. In YDSE if a slab whose refractive index can be varied is placed in fr...

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  6. In a double slit experiment, instead of taking slits of equal widths, ...

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  7. A ray of light is incident on a thin film, As shown in figure, M and N...

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  8. Let S(1) and S(2) be the two slits in Young's double-slit experiment. ...

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  9. When light is refracted into a medium

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  10. Two point source separated by d=5mum emit light of wavelength lamda=2m...

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  11. Two coherent narrow slits emitting light of wavelength lamda in the sa...

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  12. Minimum thickness of a mica sheet having mu=(3)/(2) which should be pl...

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  13. In the YDSE shown the two slits are covered with thin sheets having th...

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  14. In a YDSE with two identical slits, when the upper slit is covered wit...

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  15. Light wavelength 650 nm is incident normally upon a glass plate the gl...

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  16. Diffraction and interference of light refers to -

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  17. The phenomenon of diffraction of light was discovered by-

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  18. Sound waves shown more diffraction as compare to light rays-

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  19. The conversation going on, in some room, can be heared by the person o...

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  20. Diffraction initiated from obstacle, depends upon the

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