using System; using L=Science.Physics.GeneralPhysics; namespace Serway.Chapter36 { /// /// Example14: Finding the Correct Exposure Time /// The lens of a certain 35-mm camera (where 35 mm is the /// width of the film strip) has a focal length of 55 mm and /// a speed (an f-number) of f/1.8. The correct exposure /// time for this speed under certain conditions is known /// to be (1/500) s. /// (A) Determine the diameter of the lens. /// (B) Calculate the correct exposure time if the f-number /// is changed to f/4 under the same lighting conditions. /// public class Example14 { public Example14() { } private string result; public string Result { get{return result;} } public void Compute() { result+="Read the book!"; } } }