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Suppose a certain wavelength of light falls on a diffraction grating and creates an interference pattern. What happens...

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Physics

  1. Suppose a certain wavelength of light falls on adiffraction grating and creates an interferencepattern.

    1. What happens to the interference pattern if the samelight falls on a grating that has more lines percentimeter?

    2. What happens to the interference pattern if alonger-wavelength light falls on the same grating?

    3. Suppose a feather appears green but has no greenpigment. Explain in terms of diffraction.

    4. Why is the index of refraction always greater than orequal to 1?

    5. Draw how light changes direction (toward or away fromthe perpendicular) in the following situations:

    6. goes from air to water?

    7. goes from water to glass?

    8. goes from glass to air?

    9. Why does the wavelength of light decrease when it passesfrom vacuum into a medium?

    10. Describe the types of images the following “devices” cancreate, and where the object needs to be located in relation to the“device” for that type of image to occur. Be clear in discussingall cases.

    11. a convex mirror

    12. a concave mirror

    13. a convex lens

    14. a concave lens

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