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Across 1. Equations describe the interrelationship between electric field, magnetic field, electric charge, and electric current 3. Branch of physics that studies the physical properties of light 5. Width of a distribution at half of its maximum value 9. Polarized light is represented with _____matrices 10. <W| 11. Measure of the time-averaged energy flux 14. Display which uses organic material as a diode type light emitting material 15. Norfolk State University mascot 16. The distance between crests of a waveform. 18. first Substance to produce laser action in the visible spectrum 19. |W> 21. Wave phenomenon commonly observed in mirrors 22. Special theory of relativity 24. A radio device for detecting the position of distant masses and the course of moving objects. 28. Source of loss in optical materials 31. Arrangement of mirrors that forms a standing wave cavity resonator for light waves 32. Gas laser, usual operats at 632.8 nm 35. Causes the spatial separation of a white light into spectral components 36. Equal to the speed of the wave divided by the wavelength of the wave 39. Superposition of two or more waves resulting in a new wave pattern 42. Aluminum 45. Unwanted radiative transition in a laser system 46. Diode such that light emitted at a p-n 48. The generation and sending out of radiant energy 49. gain______ is the reduce in optical gain as the cavity intensity increases 50. A device that produces an intense, coherent, directional beam of microwave 51. Light as a particle and a ______ 52. Separation of light into its component wavelengths 53. Energy per unit time 54. A device that produces an intense, coherent, directional beam of visible light 55. Fundamental particles, incapable of independent existence, that combine to form particles such as protons and neutrons. 56. A general law describing the reflection, refractoin, and transmission of light from an interface. 57. Amplification

Down 2. Photometric measure of the density of luminous intensity in a given direction 4. Consequence of the high spatial conherency of a Laser 6. The shape of the Laser _____ can be changed 7. Visible EM radiation 8. ______ barium borate 12. Process of blocking the transmission of the cavity to permit a greater upper state population. 13. One billionth of a meter 17. A piece of glass that refracts light 20. The passage of radiant energy through a medium 23. An inhomogenous broadening process 25. A sensor that collects light and turns it into an electrical signal 26. Light that is unable to escape from media experience 27. Wedge-shaped piece of glass used to disperse light into a spectrum 29. System of equations that describes the changes in populations of various states 30. The bending of light 33. metric unit of illuminance 34. Imaging technique whereby a beam of electrons is transmitted through a specimen 37. The material surrounding the core of an optical waveguide. 38. An optical element consisting of two plane parallel reflective surfaces 40. The spacing between the modes of a Fabry-Perot etalon 41. photons with the same relative phase are _____ 43. A light-sensitive membrane lining the posterior part of the inside of the eye 44. _______efficiency- percentage of pump band population that transfers to the upper laser state 47. device that selectively transmits light having certain properties 49. A resonator where the beam is permanently trapped