Originally posted by shezill
but what numbers do i plug in. Do i have to use a fomula on the 1.8eV first to get the numbers or just use that.
The energy of a photon can be calculated using the formula E = hν, where E is the energy in joules, h is Planck's constant (6.626 x 10^-34 J*s), and ν is the frequency of the photon in hertz.
The wavelength of a photon can be calculated using the formula λ = c/ν, where λ is the wavelength in meters, c is the speed of light (3.00 x 10^8 m/s), and ν is the frequency of the photon in hertz.
The energy of a photon is typically measured in joules (J), but it can also be expressed in electron volts (eV) or kilojoules per mole (kJ/mol).
The energy of a photon is inversely proportional to its wavelength. This means that as the energy of a photon increases, its wavelength decreases, and vice versa.
To convert between different units of energy for a photon, you can use conversion factors such as 1 eV = 1.602 x 10^-19 J and 1 kJ/mol = 6.022 x 10^23 eV. To convert between units of wavelength, you can use the formula λ (in nm) = 1240/E (in eV), where E is the energy of the photon in eV.