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Flashcards in Definitions Deck (6):
1

Photoelectric effect

It is the release of electrons from the surface of a metal when electromagnetic radiation is incident on it's surface

2

Threshold frequency

It is the minimum frequency of an e.m radiation required for a photon to eject an electron from the surface

3

1- When does photoemission takes place ?
2- What can you say about threshold frequency of metals

1-It takes place instantaneously , there is no decay between illumination and emission
2-Different metals have different threshold frequency

4

-What about emission? Talk about frequency and intensity

-Emission or not it only depends on the frequency of radiation.
-It does not depend not then intensity of radiation

5

For a given frequency...

The rate of emission of photoelectrons is proportional to the intensity of radiation

6

Stopping voltage

It is the minimum value of the potential difference necessary to stop the electron flow