The photoelectric threshold wavelength of silver is \( 3250 \times 10^{-10} \) \( \mathrm{~m} \). The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength \( 2536 \times 10^{-10} \mathrm{~m} \) is: (2017-Delhi) (Given h \( =4.14 \times 10^{-15} \mathrm{eV} \) and \( \mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1} \) )
a. \( \approx 0.6 \times 10^{6} \mathrm{~ms}^{-1} \)
b. \( \approx 61 \times 10^{3} \mathrm{~ms}^{-1} \)
c. \( \approx 0.3 \times 10^{6} \mathrm{~ms}^{-1} \)
d. \( \approx 6 \times 10^{5} \mathrm{~ms}^{-1} \)
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