The photoconductive cell is a two terminal semiconductor device
whose terminal reistance varies linearly with the intensity of
incident light .
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there are three types ,they are photoconductive cell
,photoemissive cell and photovoltiac cell
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William George Williams has written:
'The hole mobility and photoconductive properties of
rubrene'
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Carling Technologies produces rocker switches, toggle switches,
push button switches, rotary switches and mini and submini
switches. Each of these types of switches are offered in a variety
of sizes.
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you need switches to help you see. no switches can not help you
see.