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For what distance is ray optics a good a...

For what distance is ray optics a good approximation when the aperture is 3mm wide and the wavelength is 500 nm?

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`Z_(F)=(a^(2))/(lamda)=((3xx10^(-3))^(2))/(5xx10^(-7))=18m`
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  1. For what distance is ray optics a good approximation when the aperture...

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  2. Young's experiment is performed with light of wavelength 6000Å where i...

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  3. In a Young's double slit experiment, the intensity at a point where th...

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  4. A narrow slit of width 2 mm is illuminated by monochromatic light of ...

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  5. In Young's double slit experiment if d, D and lamda represent the dist...

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  6. In Young's double slit experimental set up, it the wavelength alone is...

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  7. Which one of the following statements is correct?

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  8. In Young's double slit experiment with slit separation d, a monochroma...

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  9. Unpolarized light is incident on a plane sheet of water surface. The a...

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  10. If the intensity ratio of two coherent sources used in Young's double ...

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  11. According to Rayleigh scattering law, the amount of scattering is

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  12. When we close one slit in the Young's double slit experiment, then

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  13. A beam of light is incident on a glass slab (mu=1.54) in a direction a...

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  14. The polarising angle for a medium is found to be 60^(@).The critical a...

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  15. In Youngs double slit experiment, to increase the fringe width

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  16. Light of the wavelength 5000Å is incident normally on a slit of width ...

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  17. Two plane wave fronts of light, one incident on a thin convex lens and...

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  18. If a ray of light is incident at a glass surface at the Brewster's ang...

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