Alight source of wavelength illuminates a metal and ejects photoelectrons with a-25 maximum kinetic energy of 2ev.If the same metal is irradiated with another source that emits light at wavelength half of the first source .where the work-function of the metal is 1 ev , then the maximum kinetic energy of the ejected electrons is 4ev I O 5ev .II O 3ev III O
Alight source of wavelength illuminates a metal and ejects photoelectrons with a-25 maximum kinetic energy of 2ev.If the same metal is irradiated with another source that emits light at wavelength half of the first source .where the work-function of the metal is 1 ev , then the maximum kinetic energy of the ejected electrons is 4ev I O 5ev .II O 3ev III O
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Transcribed Image Text:السؤال 4
Alight source of wavelength illuminates a metal and ejects photoelectrons with a-25
maximum kinetic energy of 2ev.If the same metal is irradiated with another source
that emits light at wavelength half of the first source .where the work-function of
the metal is 1 ev , then the maximum kinetic energy of the ejected electrons is
4ev I O
5ev .II O
3ev III O
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