Unit 12 Lenses and color

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Across
  1. 6. Light with unsynchronized wave fronts that illuminates objects with an even, white light. (761): Light whose waves are out of step, with their maxima and minima not coinciding.
  2. 12. A pattern of light and dark bands on a screen, resulting from the constructive and destructive interference of light waves passing through two narrow, closely spaced slits in a barrier.
  3. 14. States that the product of the index of refraction of a medium and the sine of the angle of incidence equals the product of the index of refraction of a second medium and the sine of the angle of refraction.
  4. 15. States that the inverse of the focal length of a sperical lens equals the sum of the inverses of the image position and the object position.
  5. 16. A combination of two or more lenses with different indices of refraction (such as a concave lens with a convex lens) that is used to minimize a chromatic aberration.
  6. 17. Light from two or more sources, whose additive superposition produces smooth wave fronts. (761): Light whose waves are in step, with coinciding maxima and minima.
  7. 18. A pattern on a screen of constructive and destructive interference of Huygens’ wavelets
  8. 19. Light having only one wavelength.
  9. 20. A phenomenon in which a spectrum of colors is produced due to the constructive and destructive interference of light waves reflected in a thin film.
  10. 21. A piece of transparent material, such as glass or plastic, that is used to focus light and form an image.
Down
  1. 1. A device consisting of large numbers of single slits that are quite close together, diffract light, and form a diffraction pattern that is an overlap of single-slit diffraction patterns; can be used to precisely measure light wavelength or to separate light of different wavelengths.
  2. 2. States that if the central bright spot of one image falls on the first dark ring of the second image, the images are at the limit of resolution.
  3. 3. A spherical lens defect in which light passing through a lens is focused at different points, causing an object of refraction (such as a concave lens with a convex lens) that is used to minimize a chromatic aberration viewed through a lens to seem to be ringed with color.
  4. 4. The certain angle of incidence in which the refracted light ray lies along the boundary between two media.
  5. 5. Occurs when light traveling through an area with a higher index of refraction to an area with a lower index of refraction hits a boundary at an angle that exceeds the critical angle and all light reflects back into the area with the higher index of refraction.
  6. 7. For a medium, is the ratio of the speed of light in a vacuum to the speed of light in that medium.
  7. 8. A vision defect in which a person cannot see distant objects clearly because images are focused in front of the retina; can be corrected with a concave lens.
  8. 9. A vision defect in which a person cannot see close objects clearly because images are focused behind the retina; can be corrected with a convex lens.
  9. 10. The separation of white light into a spectrum of colors by such means as a glass prism or water droplets in the atmosphere.
  10. 11. A diverging lens, thinner at its middle than at its edges, that spreads out light rays passing through it when surrounded by material with a lower index of refraction; produces a smaller, virtual, upright image.
  11. 13. A converging lens, thicker at its center than at its edges, that refracts parallel light rays so the rays meet at a point when surrounded by material with a lower index of refraction; can produce a smaller, inverted, real image, or a larger, upright, virtual image.