Green light has a frequency of about 6.00 \times 10^{14}\; \rm s^{-1}. What is the energy of green light? 2)Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (\rm nm), where 1\;{\rm nm}= 10^{-9}\;{\rm m}. What is the energy of the X-rays?