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46 Multiple choice questions

  1. term for the distance from the optical center to the principal focal point
  2. Convergenging lenses have a _____ (positive, negative) focal length.
  3. The wavelength of light entering an optically denser medium must _____.
  4. two defects of vision that can be corrected by wearing eyeglasses or contact lenses
  5. term for the index that relates the speed of light in a vacuum to the speed of light in a particular medium
  6. the first law of refraction
  7. term for the bending of light rays at the boundary between two media differing in optical density
  8. the thin lens equation
  9. term for a ray that travels parallel to the principal axis, and then refracts through the mirror to the principal focal point
  10. term for the center of the lens
  11. A ____ of water is due to the refraction of sunlight as it passes through hot, expanding air at ground level.
  12. principle that states that the path of a light ray subjected to reflection or refraction is traced in reverse by any ray coming along the path in the opposite reaction
  13. term for a ray that pases through the optical center of a lens without deviation on the far side
  14. term for a ray that aproaches the lens through the focal point
  15. Diverging lenses have a ____ (positive, negative) focal length.
  16. The wavelength of light entering a medium of lower optical density must ______.
  17. term for a caved-in surface witht he same curvature ast he surface of a sphere
  18. term for actual light rays intersecting after refraction
  19. When light enters a new medium, _____ and ___ change.
  20. term for light rays extending from a lens in order to intersect
  21. the most important diverging lenses
  22. term for the point of convergence on the opposite side of the lens, to which rays are directed
  23. another term for the simple relationship expressed by the first law of refraction
  24. term for lenses that redirect parallel rayst oward a point of convergence
  25. the lensmaker equation
  26. another term for the focal length
  27. If a new medium is nontransparent, light is partly ____ and partly _____.
  28. term for farsightedness
  29. term for a bulging surface with the same curvature as the surface of a sphere
  30. term to describe a flat surface
  31. term for reflection as a result of an angle of incidence greater than the critical angle
  32. term for the angle between a refracted ray and the normal to the boundary
  33. term for lenses that spread parallel rays apart
  34. term for the perpendicular to a plane at the point of tangency
  35. When the angle of incidence reaches the ____ ___, the angle of refraction becomes 90 degrees.
  36. term for nearsightedness
  37. term for a material's resistance to the transmission of light waves
  38. the most important converging lenses
  39. the unit for the power of a lens
  40. term for the angle between an incoming ray and the normal to the boundary
  41. the equation for the power of a lens
  42. term an instrument that measures refractive index
  43. If two adjoining media have the same optical density, light is fully _____.
  44. If both media are transparent, but have different optical densities, some light is ____ and some is ____.
  45. term for the axis which is perpendicular to the lens plane
  46. term for a plane perpendicular to the principal axis at the optical center