Does a light dependent resister mean that only in light a bulb will light up? please explain because I am really confused!
They remember on gentle thrilling electrons from the valence band or doping band to the conduction band of the fabric. those excited electrons finally decay returned, yet make a contribution to conductivity collectively as they're in the conduction band. The stability between the fee at which gentle is thrilling electrons (the luminosity) and the decay returned determines the conductivity - and for this reason it relies upon on how plenty gentle there is.
One can be used to conrol a switching circuit to light a bulb, when the voltage rises (or falls) on the switch input. The switch could be a transistor circuit, or an op amp.
dont know where the bulb fits in, but in the presense of light enegry, the resistance will drop and the absence of light energy, the resistance will rise to max resistance
