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State two conditions to obtain sustained...

State two conditions to obtain sustained interference of light. In young's double slit experiment, using light of wavelength 400 nm, interference fringes of width X are obtained. The wavelength of light is increased to 600 nm and the separation between the slits is halved. if one wants the observed fringe width on the screen to be the same in the two cases, find the ratio of the distance between the screen and the plane of the slits in the two arrangements.

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MODERN PUBLICATION-WAVE OPTICAL-Revision Exercises (Very Short Answer Questions)
  1. What is sustained interference ? Write necessary conditions for it.

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  2. What are coherent sources?

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  3. State two conditions to obtain sustained interference of light. In you...

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  4. What are coherent sources of light ? Why are coherent sources required...

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  5. What is diffraction of light?

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  6. The refractive index of plastic is sqrt(3). Calculate the angle of ref...

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  7. State Huygens' principle of diffraction of light.

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  8. What happens to interference fringes when the distance between the two...

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  9. If one of the slits in Young's experiment is covered, what effect will...

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  10. Write the relationship between the path difference and the wavelength ...

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  11. What is the condition of obtaining bright interference fringes?

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  12. If you move the source slit closer to the double slit in Young's exper...

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  13. Will there be an interference pattern on the screen if the slits in Yo...

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  14. Distinguish between interference and diffraction of light.

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  15. Three lights of red, blue and green colour are used successively in Yo...

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  16. What wil be the effect on the fringes, if Young's double slit experime...

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  17. What will be the ratio of slit widths if the amplitudes of the light w...

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  18. What is the effect on the interference fringes in Young's double slit ...

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  19. What are coherent sources ? Define interfernece of light. Obtain the c...

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  20. What are coherent sources of light ? Why nointerference pattern is ob...

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