Atomic emission spectra of the hydrogen atom show a red line at a wavelength of 656 nm. Given that the speed of light is and Planck’s constant is , what is the energy possessed by one photon at this wavelength?
The atomic emission spectrum of the hydrogen atom shows a violet line at a wavelength of 434.0 nm. Calculate the energy of one photon at this wavelength. Use a value of for the speed of light and for Planck’s constant.
Heated thallium ions emit photons with an energy of J.
Calculate the wavelength of the emitted photons.
Calculate the energy per mole of emitted photons.