The photoelectric threshold of Tungsten is \( 2300 \AA \). The energy of the electrons ejected from the surface by ultraviolet light of wavelength \( 1800 \AA \) is
(a) \( 0.15 \mathrm{eV} \)
(b) \( 1.5 \mathrm{eV} \)
(c) \( 15 \mathrm{eV} \)
(d) \( 150 \mathrm{eV} \)
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