i have some questions regarding photodiodes, made obvious by my title, so here it is: - is it true that when a photodiode is in forward biased, it acts just like a normal diode? If so, then does it still receive photons from outside sources? if so, then does the photons received affected the forward- biased photodiode in any way? -In a reverse biased photodiode, is there still a voltage drop in the diode itself? if so, why is there a voltage drop, since the dark current is generated by the photons itself? -In a reverse-biased photodiode, what happens when no outside light source is shining on to the photodiode? does it act like a normal reverse-biased diode?