Modern Phys If s Flashcards
1
Q
X-rays
A
High frequency electromagnetic radiation when high speed electrons strike a metal target of high melting point
2
Q
Work function
A
Of a metal, is the minimum energy needed to remove the loosest electron from the surface of a metal
3
Q
Threshold frequency
A
Minimum frequency needed for photo emission to occur
4
Q
Photocell
A
Device that detects electric current when light of a suitable frequency shines on it
5
Q
Photoelectric effect
A
Release of electrons from the surface of a hot metal when electromagnetic radiation of a suitable frequency falls on it.
6
Q
Thermionic emission
A
The release of electrons from the surface of a hot metal
