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Question : 3
Total: 27
Define the term "threshold frequency" in the context of photoelectric emission.
OR
Define the term "Intensity" in photon picture of electromagnetic radiation.
OR
Define the term "Intensity" in photon picture of electromagnetic radiation.
Solution:
Threshold frequency equals the minimum frequency of incident radiation (light) that can cause photoemission from a given, photosensitive surface. [Alternatively] The frequency below which the incident radiations cannot cause the photoemission from photosensitive surface.
OR
Intensity of radiation is proportional to (equal to) the number of energy quanta (photons) per unit area per unit time.
OR
Intensity of radiation is proportional to (equal to) the number of energy quanta (photons) per unit area per unit time.
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