Question
Download Solution PDFThe SI unit of work function of a metal used in photoelectric effect is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 1) i.e. joule (J)
CONCEPT:
- Work function: It is the minimum amount of energy required to cause photo-emission of electrons from a metal surface when light is incident on it.
- The work function is also known as the threshold energy.
- The energy of the incident light is equal to the sum of the work function and the photoelectron kinetic energy.
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Therefore, the total energy of photon = work function + maximum kinetic energy of the electron.
The energy of a photon is given by the equation:
\(E =hν\)
Where ν is the frequency of incident light and h is the Planck's constant.
EXPLANATION:
- The work function is a measure of energy. All forms of energy have the same SI unit i.e. joule (J).
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