How can different EM signals (like radio broadcasts and cell phone conversations) take place without intererring with each other? 1) radios and cellphones r tuned to only detect em waves of the proper frequency
2) em waves of different wavelengths never interfere with on another
3) radio broadcasts r sent at ground level while cellphone signals r sent to space
4) the interference only happens for a fraction of a second. most of the time theyre not interferring