I see simple example circuits with LEDs, one resistor, an LED, and a power source. Why do these not have reverse voltage issues? What IS reverse voltage. Does it apply to a DC circuit *note, I have not gotten to AC circuits yet, so I know nothing of them. ARGH!!! *Tears hair out*
As long as you have the led wired in the correct direction (anode terminal towards voltage negative terminal), you will never have a reverse voltage problem with a DC voltage series circuit. However if you reverse the polarity of the voltage source (swap + and - terminals), or turn the led terminals around in the circuit, then the led is subjected to a reverse biased condition (turned off) and it's reverse voltage breakdown specification comes into play.
That make sense?