When light radiation of frequency 6.97 \times 10^{14} {\Hz} is incident on a metal surface, then the electrons are ejected from the surface with a maximum speed of 6.6 \times 10^5 {\ms}^{-1}. The threshold frequency of the metal surface is ( \take {\h}=6.6 \times 10^{-34} {\Js} ; mass of electron =9 \times 10^{-31} {\kg})

TS EAMCET Medical 11 May 2023 Shift 2 Paper

Question : 114 of 160

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When light radiation of frequency 6.97×1014‌Hz is incident on a metal surface, then the electrons are ejected from the surface with a maximum speed of 6.6×105ms−1. The threshold frequency of the metal surface is
(take‌h=6.6×10−34‌Js; mass of electron =9×10−31‌kg)

5×1014‌Hz
4×1014‌Hz
3×1014‌Hz
1×1014‌Hz

Validate

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