A metal surface is exposed to \( 500 \, \text{nm} \) radiation. The threshold frequency of the metal for photoelectric current is \( 4.3 \times 10^{14} \, \text{Hz} \). The velocity of ejected electron is ________ \( \times 10^{5} \, \text{m s}^{-1} \). (Nearest integer)
[Use : \( h = 6.63 \times 10^{-34} \, \text{J s} \), \( m_{e} = 9.0 \times 10^{-31} \, \text{kg} \) ]
