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Chapter 27: Q19CQ (page 995)
As the width of the slit producing a single-slit diffraction pattern is reduced, how will the diffraction pattern produce change?
As the slit width is reduced, more diffraction is observed.
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Suppose a feather appears green but has no green pigment. Explain in terms of diffraction.
An inventor notices that a soap bubble is dark at its thinnest and realizes that destructive interference is taking place for all wavelengths. How could she use this knowledge to make a non-reflective coating for lenses that is effective at all wavelengths? That is, what limits would there be on the index of refraction and thickness of the coating? How might this be impractical?
If a beam of white light passes through a diffraction grating with vertical lines, the light is dispersed into rainbow colors on the right and left. If a glass prism disperses white light to the right into a rainbow, how does the sequence of color compare with that produced on the right by a diffraction grating?
A water break at the entrance to a harbour consists of a rock barrier with a \({\rm{50}}{\rm{.0 - m}}\)-wide opening. Ocean waves of \({\rm{20}}{\rm{.0 - m}}\) wavelength approach the opening straight on. At what angle to the incident direction are the boats inside the harbour most protected against wave action?
Red light of wavelength of 700 nm falls on a double slit separated by 400 nm. (a) At what angle is the first-order maximum in the diffraction pattern? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?
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