(a) DefinePhotoelectric effect ? Mention its one practical application in daily life. (b) Electrons are emitted with zero velocity from a mental surface when it is exposed to radiation of wavelength 6800 Å. Calculatethresholds freqency (V_o) and work function (W_o) of the mental.

(a) DefinePhotoelectric effect ? Mention its one practical application

1.	(a) DefinePhotoelectric effect ? Mention its one practical application in daily life. (b) Electrons are emitted with zero velocity from a mental surface when it is exposed to radiation of wavelength 6800 Å. Calculatethresholds freqency (V_o) and work function (W_o) of the mental.
Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :`v_o=4.41 <a href="https://interviewquestions.tuteehub.com/tag/xx-747671" style="font-weight:bold;" target="_blank" title="Click to know more about XX">XX</a> <a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a>^(14) s^(-<a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>) W_o= 2.92 xx 10^(-19)` J</body></html>