'An "electric eye" alarm detects a break in the beam of light not with a simple "electric" cell but with this type of cell'
photoelectric
PHYSICS: An electric eye alarm detects a break in the beam of light not with a simple electric cell but with this type of cell
An "electric eye" alarm detects a break in the beam of light not with a simple "electric" cell but with this type of cell
An "electric eye" alarm detects a break in the beam of light not with a simple "electric" cell but with this type of cell
PHYSICS
photoelectric
PHYSICS