球面镜焦距的Java程序

焦距是镜子中心到主焦点之间的距离。为了确定球面镜的焦距，我们应该知道该镜面的曲率半径。从顶点到曲率中心的距离称为曲率半径。

焦距是曲率半径的一半。
公式 ：

F =   ( R / 2 )      for concave mirror
F = - ( R / 2 )      for convex mirror

例子 ：

For a convex mirror
Input : R = 30 
Output : F = 15


For a convex mirror
Input : R = 25
Output : F = - 12.5

// Java program to determine
// the focal length of a
// of a spherical mirror
import java.util.*;
import java.lang.*;
  
public class GfG{
    // Determines focal length
    // of a spherical concave
    // mirror
    public static float focal_length_concave(float R)
    {
        return R / 2 ;
    }
  
    // Determines focal length of a 
    // spherical convex mirror
    public static float focal_length_convex(float R)
    {
        return - ( R / 2 ) ;
    }
      
    // Driver function
    public static void main(String argc[])
    {
        float R = 30 ;
          
        System.out.print("Focal length of" +
                         "spherical concave"+
                         "mirror is : "+
                         focal_length_concave(R) +
                         " units\n");
                          
        System.out.println("Focal length of"+
                           "spherical convex"+ 
                           "mirror is : "+
                           focal_length_convex(R) + 
                           " units");
    }
}
  
/* This code is contributed by Sagar Shukla */

输出：

Focal length ofspherical concavemirror is : 15.0 units
Focal length ofspherical convexmirror is : -15.0 units

请参阅完整的文章来确定球面镜的焦距以获取更多详细信息！