Q. 34.3( 51 Votes )

Define the term “threshold frequency”, in the context of photoelectric emission.


Define the term “Intensity” in photon picture of electromagnetic radiation.

Answer :

For a given photosensitive material, threshold frequency is the minimum frequency of radiation that is required for photoelectric emission from the material.


Intensity is a measure number of photons passing through a given cross section per unit area.

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