Page 79 - EmodulGelombang
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                                                  = 10 log
                                                            0
                                                                 
                                             60 dB = 10 log
                                                            10 −12
                                             60           
                                                = log
                                             10       10 −12
                                                        
                                               6
             = 60 dB                         10 =     −12
                                                    10
                                                    −6
                                                            2
                                                = 10  W/m
           = 50 m

                    ⋯                               
                                                =   2
                                                 4                
                                               −6
                                                        2
                                             10  W/m =
                                                            4(3,14)(50) 2
                                               −6
                                             10  W/m =           
                                                        2
                                                            3,14×10 4
                                                     −6
                                                                         4
                                                             2
                    = 10 log                    = (10  W/m )3,14 × 10
                              
                                                           −2
                            0
                                                = 3,14 × 10  watt

                          
                     =
                      4     2                3,14 × 10 −2  watt
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