1–22. How  much  does  the  Nite-Eye  pocket scope  weigh? 1. 10 ounces 2. 15 ounces 3. 2.5 pounds 4. 4 pounds 1-23. What is the basis for the improved night  observation  and  aimed  fire of  weapons  provided  by  crew-served and  individual-served  sights? 1. Available  light  from  the  night sky 2. Greater   magnification 3. Special  mounting 4. Attached  illumination  devices 1-24. Instructions  for  donning  the AN/PVS-5C  NVG  are  permanently mounted on the side of the unit. 1. True 2. False 1-25. The eyes of some animals that hunt at night and sleep in the daytime have  retinas  composed  almost entirely of cones. 1. True 2. False 1-26. Which  of  the  following  military applications is not met by lasers used in the Navy today? 1. Training  aids 2. Communications 3. Target  destruction 4. Landing  systems 1–27. Lasers operate on which of the following   principles? 1. Stimulated  emission 2. Spontaneous  decay 3. Stimulated  decay 4. Random  direction 1–28. In what state do electrons in a lasing  material  reside? 1. Steady 2. Excited 3. Unstable 4. Both 2 and 3 above 1-29. During  lasing,  a  burst  of  light will  be  transmitted  along  which  of the  following  paths? 1. Through  the  optical  axis 2. Through  the  100%  reflecting mirror 3. Through  the  optical  cavity 4. Through  the  99%  reflecting mirror 1-30. Which  of  the  following  statements is/are  true  regarding  differences in light from a conventional source and light from a laser? 1. The intensity of light from a conventional  source  decreases rapidly  with  distance 2. The beam intensity of a laser remains almost the same as at the source 3. A laser requires much lower power 4. All of the above 1-31. Which  of  the  following  surfaces will  not  significantly  change  the divergence  of  the  striking  laser beam? 1. Curved  specular 2. Curved  diffuse 3. Flat  specular 4. Flat diffuse 1-32. For which of the following surfaces is the amount of divergence  determined  by  the  size of the beam? 1. Curved  specular 2. Curved  diffuse 3. Flat specular 4. Flat diffuse 3