Excitation Energy Quantum Theory and Atomic Spectra

3 Excitation Energy (Quantum Theory and Atomic Spectra) [7] 

In 1900 Planck derived an empirical relationship for data from a black body radiation by introducing a concept of quantisation of energy he was able to prove the relationship theoretically. It had been shown that at a specific temperature the spectrum of radiation from a black body was unparalleled in its characteristics and the energy varied 

Planck showed that a photon has particle properties and proved that the energy of a photon is proportional to its frequency. This shows that energy and wavelength are inversely related, i.e. as the energy increases, the wavelength decreases and vice versa. 

In the ground state the electrons are at their lowest energy levels and by contacting the atoms with thermal or electrical excitation, the energy is transferred to the atoms causing the atoms to collide. These collisions cause the electrons in the atoms to change to higher 

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