A metal has work function of 4.375 eV Calculate its threshold frequency. (h = 6.6 x 10-34Js; 1eV = 1.6 x 10-19J)
a
2.01 X 1015Hz
b
1.06x1015Hz
c
6.30 x 1014Hz
d
1.60 x 1014Hz
Explanation
Correct Option
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Ades0la
12 years ago
Wo = work function= 4.375ev x 1.6x10^-19= 7x10^-19J
h = Planck's constant= 6.6 x 10^-19Js
f= threshold frequency= ?
Wo=hf
f=Wo/h
f= 7x10^-19/6.6x10^-34
f= 1.06x10^15Hz
