The kinetic energy of electrons emitted, when radiation of frequency 1.0 \times 10^{15} {\Hz} hits a metal, is 2 \times 10^{-19} {\J}. What is the threshold frequency of the metal (in Hz )? ( {\h}=6.6 \times 10^{-3} {\Js}) [TG EAPCET 9 May 2024 Shift 2]

Atomic Structure

Section: Chemistry

Question : 7 of 9

Marks: +1, -0

The kinetic energy of electrons emitted, when radiation of frequency 1.0×1015‌Hz hits a metal, is 2×10−19J. What is the threshold frequency of the metal (in Hz )?
(h=6.6×10−3‌Js)

[TG EAPCET 9 May 2024 Shift 2]

‌3.5×1015
‌3.3×1014
‌6.97×1015
‌6.97×1014

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