4-22. Of the following factors, which one 4-26. should you take into account when determining the luminous range of a light? 1.    Height  of  the  light 2.    Curvature  of  the  Earth 3.    Observer's  height  of  eye 4.    Intensity  of  the  light  itself 4-23. When  you  compute  the  visibility  of a light,   the computed visibility will always exceed the light's luminous range. 1. True 2.    False Figure  4-A IN ANSWERING QUESTIONS 4-24 THROUGH 4-27, REFER TO FIGURE 4-A. 4-24. Determine  the  computed  range  of light Alfa when the observer has a height of eye of 50 feet, nominal range of 20 miles, and the height of light Alfa is 90 feet above the water. 1. 13.9 mi 2. 16.0 mi 3. 19.0 mi 4. 24.1 mi 4-25. Determine  the  horizon  distance  of light Bravo when the observer has a height of eye of 55 feet, nominal range of 11 miles, and the height of light Bravo is 105 feet. 1. 9.2 mi 2. 20.2 mi 3. 22.0 mi 4. 31.2 mi An observer has a height of eye of 40 feet, the height of light Charlie is 400 feet, and the weather is clear. What is the nominal  range  of  light  Charlie? 4-27. 4-28. 4-29. 1. 10.0 mi 2. 13.5 mi 3.    22.9  mi 4 .    36.4 mi If you observe two objects from sea level,   how much farther can you see an object 140 feet high than an object 70 feet high? 1.    3.4  mi 2. 3.9 mi 3. 4.2 mi 4. 4.4 mi Which  of  the  following  factors influences  the  shape  and construction  of  a  lighthouse? 1. Location 2.    Importance  of  its  light 3.   Prevalence  of  violent  storms 4.   Each of the above What is the primary purpose of the various patterns painted on lighthouses? 1.    To  aid  in  the  identification  of the  structure 2. To  prevent  low-flying  aircraft from  hitting  the  structure 3.    To  decorate  the  structure 4.   To  make  the  structure  visible at  greater  distances 20