Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800(Angstrom).
Calculate threshold frequency and work function of the metal.
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hc/wavelength=work function
hc=12400
so12400/6800=124/68=31/17
frequency=12400×1.6×10^-19/6.6×10^-34
solve it
hc=12400
so12400/6800=124/68=31/17
frequency=12400×1.6×10^-19/6.6×10^-34
solve it
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