write a short note on emission spectra..
Answers
Explanation:
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. ... Each element's emission spectrum is unique.
Explanation:
The emission spectrum depends strongly on excitation wavelength. This has been attributed to differences in the penetration depth of the exciting radiation at different wavelengths. The microcrystalline structure close to the surface may vary with depths and different kinds of excimers will be excited. The variation in the emission spectrum of a thin film of polystyrene which has been grown from a solution of polystyrene in benzene has been studied recently as function of time(44). Concurrent observation of the films by electron microscopy showed that these changes in emission spectrum are strongly correlated to changes in the microcrystalline structure of the films.