What is the maximum speed of the emitted photoelectrons?
3.4×105 m s−13.4 \times 10^5 \text{ m s}^{-1}3.4×105 m s−1
5.8×105 m s−15.8 \times 10^5 \text{ m s}^{-1}5.8×105 m s−1
8.2×105 m s−18.2 \times 10^5 \text{ m s}^{-1}8.2×105 m s−1
1.5×106 m s−11.5 \times 10^6 \text{ m s}^{-1}1.5×106 m s−1
