Further to the sister state relationship, the City of Rockingham in Western Australia and the City of Ako in Hyogo signed a sister city agreement in 1997. It is one of nine sister city relationships between Western Australian and Japanese cities.
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.The energy of the emitted photon is equal to the energy difference between the two states.There are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum.Each element's emission spectrum is unique.here are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum. Each element's emission spectrum is unique.
1 A given atom will absorb and emit the SAME frequencies of electromagnetic (E-M) radiation. 2  A gas of hydrogen atoms will produce an absorption line spectrum if it is between you (your telescope+spectrograph) and a continuum light source, and an emission line spectrum if viewed from a different angle. This is called an emission spectrum (just peaks, not continuous). 2  The E-M radiation frequencies absorbed and emitted match the allowed energy levels in the atom. 3  The allowed energy levels in an atom depend mostly on the electric field configuration.