Calculate the energy of one photon for each of the following waves:
a. A radio station broadcasting on a wavelength of 7.5 meters
b. An ultraviolet wave from the sun, with a wavelength of 6.8 nm
c. A wave from your laptop screen, with a wavelength of 472 nm
d. A wave from an alien’s gamma ray gun, with a wavelength of 3 Angstroms (10-10M)