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of 46 available terms

### 46 Matching questions

1. decrease
2. absorbed, reflected
3. critical angle
4. hyperopia
5. central ray
6. refractive index
7. convergig lenses
8. principal focal point
9. negative
10. refractometer
11. transmitted
12. angle of incidence
13. double convex lenses
14. real image
15. 1/f = (n-1) (1/r1 - 1/r2)
16. virtual image
17. n1 sin θ1 = n2 sin θ2
18. focal ray
19. 1/f = 1/do + 1/di
20. planar
21. increase
22. myopia
23. Snell's law
24. total internal reflection
25. optical density
26. principal axis
27. positive
28. optical center
29. P = 1/f
30. double concave lenses
31. principle of reversibility
32. concave
33. wavelength, speed
34. transmitted, reflected
35. diopter
36. focal length
37. diverging lenses
38. mirage
39. normal
40. parallel ray
41. refraction
42. convex
43. angle of refraction
44. secondary focal point
45. optical plane
46. myopia and hyperopia
1. a term to describe a flat surface
2. b the most important converging lenses
3. c term for the distance from the optical center to the principal focal point
4. d When the angle of incidence reaches the ____ ___, the angle of refraction becomes 90 degrees.
5. e term for a ray that pases through the optical center of a lens without deviation on the far side
6. f the most important diverging lenses
7. g term for lenses that spread parallel rays apart
8. h A ____ of water is due to the refraction of sunlight as it passes through hot, expanding air at ground level.
9. i another term for the simple relationship expressed by the first law of refraction
10. j term for a ray that aproaches the lens through the focal point
11. k Convergenging lenses have a _____ (positive, negative) focal length.
12. l term an instrument that measures refractive index
13. m The wavelength of light entering an optically denser medium must _____.
14. n When light enters a new medium, _____ and ___ change.
15. o If both media are transparent, but have different optical densities, some light is ____ and some is ____.
16. p term for nearsightedness
17. q two defects of vision that can be corrected by wearing eyeglasses or contact lenses
18. r term for the index that relates the speed of light in a vacuum to the speed of light in a particular medium
19. s If a new medium is nontransparent, light is partly ____ and partly _____.
20. t term for lenses that redirect parallel rayst oward a point of convergence
21. u If two adjoining media have the same optical density, light is fully _____.
22. v term for the point of convergence on the opposite side of the lens, to which rays are directed
23. w term for a ray that travels parallel to the principal axis, and then refracts through the mirror to the principal focal point
24. x term for the center of the lens
25. y The wavelength of light entering a medium of lower optical density must ______.
26. z term for farsightedness
27. aa term for a material's resistance to the transmission of light waves
28. ab term for light rays extending from a lens in order to intersect
29. ac the lensmaker equation
30. ad term for the bending of light rays at the boundary between two media differing in optical density
31. ae another term for the focal length
32. af term for the angle between an incoming ray and the normal to the boundary
33. ag the equation for the power of a lens
34. ah term for the perpendicular to a plane at the point of tangency
35. ai the thin lens equation
36. aj term for a plane perpendicular to the principal axis at the optical center
37. ak term for reflection as a result of an angle of incidence greater than the critical angle
38. al term for the angle between a refracted ray and the normal to the boundary
39. am Diverging lenses have a ____ (positive, negative) focal length.
40. an 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
41. ao term for the axis which is perpendicular to the lens plane
42. ap term for a caved-in surface witht he same curvature ast he surface of a sphere
43. aq the first law of refraction
44. ar term for a bulging surface with the same curvature as the surface of a sphere
45. as term for actual light rays intersecting after refraction
46. at the unit for the power of a lens