## College Physics (4th Edition)

The minimum required energy is $6.89\times 10^{-19}~J$
We can find the minimum required energy: $E = h~f$ $E = (6.626\times 10^{-34}~J~s)(1.04\times 10^{15}~Hz)$ $E = 6.89\times 10^{-19}~J$ The minimum required energy is $6.89\times 10^{-19}~J$