what do you mean by work function or threshold energy of metals ?what's the unit ? explain with example
Answers
Answer:
Work Function Definition
The work function (or workfunction) is defined as the minimum amount of thermodynamic work (i.e. energy) required to remove an electron from a solid to a point in the vacuum immediately outside the solid surface. The symbol for work function is Φ (uppercase Phi of the Greek alphabet).
Work Function in Classical Physics
The concept of a work function can be explained in both classical physics or quantum mechanics. As per classical physics, when an electron tries to escape from a metal surface, it leaves a positive image behind in the metal surface.
Due to the attraction of this positive image, the negative electron turns back to metal surface hence cannot leave the metal crystal permanently. But to overcome this attraction force an electron requires sufficient energy supplied from outside usually from external light sources. The minimum energy required just to escape an electron from a metal surface is known as work function.
Explanation:
please make me as brainlist and follow me bro
Answer:
the work function is defined as a minimum amount of thermodynamic work i.e. energy required to remove an electron from a solid to a point in the vaccum immidiately outside the solid surface.
the symbol for work function is uppercase phi