Physics · Dawn of Modern Physics
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The minimum frequency of incident light required to emit photoelectrons from the metal surface is called:
- A
Critical frequency
- B
Threshold frequency
- C
Work function
- D
None of the above
This minimum frequency is also called the threshold frequency, and the value of ν0\nu, start subscript, 0, end subscript depends on the metal. For frequencies greater than ν0\nu, start subscript, 0, end subscript, electrons would be ejected from the metal.
This option is incorrect. The critical frequency is the highest frequency that can be reflected back to earth from the ionosphere.
This minimum frequency is also called the threshold frequency, and the value of ν0\nu, start subscript, 0, end subscript depends on the metal. For frequencies greater than ν0\nu, start subscript, 0, end subscript, electrons would be ejected from the metal.
Work function is a property of a material, which is defined as the minimum quantity of energy which is required to remove an electron to infinity from the surface of a given solid.
this option is incorrect.
Tagged under Physics · Dawn of Modern Physics · 2013