The threshold wavelength for ejection of electron from metal is 310nm photon
The kinetic energy of emitted photo electrons is 36 x 10-20J. Then
frequency of incident light is.
Photoel
1) 1.5 x 1015 Hz
2) 2.5 1018 Hz
4) 2.5 x 1012
3) 1 x 1022 Hz
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Answer:
Explanation:
use the formula
hv-hv0=ke
where v0 is threshold frequency
take h common and equation as h(v-v0)=36*10^-20
v-v0=5.39*10^14
v=5.39*10^14+310nm
=5.39*10^14+3.1*10^-7
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