Hi everyOne ,
i want to know whethere there is any rule to convert Power ( in Watt or dB) to Voltage level (in V ) ? because i had found a lot of explixite conversions in so many documentations ( for example 0.21mW/cm² = 28 V/m and 34 V/m=0.31mW/cm²), so is there any rule to make such conversions ? thank you for your help ,
and good luck for all ,
The question is implicitly presuming a specific wave propagation scenario, e.g. plane waves. Under circumstances, it can be related to free space impedance of 377 ohms, similar to P=V²/R. That's apparently the case for the numbers you are giving