Question

Photocell is called electric eye
When light is incident on some semiconductor

Answer 1

Answer:

when light is incident on some semiconductor its electric resistance is reduced

I think the question is of assertion reason

So both statement are correct but is not correct explanation of first one

Answer 2

Answer:

Photoconductive cell is based on the principle that when light is incident on some semiconductor, its electrical resistance is reduced. Such cells are used in solar batteries.

Whereas photocell is used in electronic devices for giving theft warning in banks, when thief lights a torch on cash, the photocells sense it and ring the bell. Thus it is called an electric eye