In a device known as a ______ electrons are emitted when light shines on a metal surface?
a difference in charge is called a ____
I am so stuck on these last two
(1) photocell or photomultiplier
(2) The word they are probably after is "voltage", but that is really a measurement of electric potential. There is a voltage difference between two points if one point is "positive" and the other is "negative".
In a device known as a "photoelectric cell" or "photocell," electrons are emitted when light shines on a metal surface. This phenomenon is referred to as the "photoelectric effect."
On the other hand, in physics, a difference in charge is called a "voltage." Voltage represents the potential energy difference between two points in an electric circuit. It refers to the force that pushes electric charges (such as electrons) to move from one point to another.