Photoelectric threshold wavelength of a certain metal is 3000 Angstrom. If the radiation of 2000 Angstrom is incident on a metal plate *
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It is given in the question that the photoelectric threshold wavelength of a particular metal is considered to be 3000 A. Supposedly, if the radiation of 2000 A is incident on that metal plate, then the following phenomenon would have taken place :-
The photoelectrons will be emitted.
This is because, the wavelength of the incident radiation (i.e. 2000 A) is quite less than the threshold wavelength (which is, 3000 A). Thus, in such a scenario, it is impossible for positrons as well as protons to be emitted . In addition to this, the option of no electron emission will be rendered absurd, because it is false.
Ans) The photoelectrons will be emitted.
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