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Interference is produced with two cohere...

Interference is produced with two coherent sources of same intensity. If one of the sources is covered with a thin film so as to reduce the intensity of light coming out of it to half, then

A

Bright fringes will be less bright and dark fringes will be less dark

B

Bright fringes will be more bright and the dark fringes will be more dark

C

Brightness of both types of the fringes will remain the same

D

Dark region will spread completely

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The correct Answer is:
A
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NARAYNA-WAVE OPTICS-C . U . Q (interference)
  1. Which of the following is conserved when light waves interfere

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  2. The path difference between two interfering waves at a point on screen...

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  3. Interference is produced with two coherent sources of same intensity. ...

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  4. For constructive interference between two waves of equal wavelength, t...

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  5. Two coherent waves each of amplitude 'a' traveling with a phase differ...

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  6. In young's experiment of double slit, the number of times the intensit...

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  7. A Young's double slit experiment uses a monochromatic source. The shap...

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  8. The contrast in the fringes in any interference pattern depends on:

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  9. If monochromatic red light is replaced by green light the fringe width...

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  10. Interference was observed in interference chamber, when air was presen...

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  11. In young's experiment with white light central fringe is white. If now...

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  12. In young's double slit experiment the slits are of different length an...

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

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  14. When the width of slit aperture is increased by keeping 'd' as constan...

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  15. When viewed in white light, soap bubbles show colours because of

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  16. When petrol drops from a vehicle fall over rain water on road surface ...

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  17. In young's double slit experiment, the distance of the n-th dark fring...

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  18. When a thin film of thickness t is placed in the path of light wave em...

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  19. A Young's double slit experiment is performed with white light, then

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  20. Which of the following decides about the contrast between bright and d...

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