Emission of Energy by Atoms
- When atoms receive energy from a source they become excited and they can release this energy by emitting light
- The emitted energy is carried away by a photon
- The energy of the photon corresponds exactly to the energy change experienced by the emitting atom
- High-energy photons correspond to short-wavelength light and low-energy photons correspond to long-wavelength light
- The photons of red light carry less energy than the photons of blue light because red light has a longer wavelength than blue light does