The energy of visible light is of the order
of electron volts (eV). Visible light has wavelengths ranging from 400 to 700 nanometers (nm), corresponding to energy levels from 2.48 to 1.77 eV.
The energy of visible light photons can be determined using the equation E = hf, where E is the energy, h is Planck's constant (6.63 x 10^-34 J·s), and f is the frequency of the light. In the case of visible light, the frequency range is approximately 4.28 x 10^14 Hz (violet light) to 7.5 x 10^14 Hz (red light).
Calculating the energy for violet light:
E = (6.63 x 10^-34 J·s) x (4.28 x 10^14 Hz)
E ≈ 2.83 x 10^-19 Joules
Calculating the energy for red light:
E = (6.63 x 10^-34 J·s) x (7.5 x 10^14 Hz)
E ≈ 4.97 x 10^-19 Joules
Therefore, the energy of visible light photons is on the order of 10^-19 Joules.