FLAME PHOTOMETRY

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abhigyan
abhigyan's picture
FLAME PHOTOMETRY

What is RESONANCE WAVELENGTH? Atoms absorb light of the same wavelength that they emit? But how is it possible? Is there no loss of energy during the process of absorbing light energy- getting raised to a higher energy state - emmission of radiation and return to ground state. If there is any loss of energy the wavelength of the emmited radiation should ideally be longer than the one absorbed?

Sami Tuomivaara
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abhigyansaha,

abhigyansaha,

Resonance wavelength, as you said, is a particular wavelength of radiation that is absorbed by an electron (in flame spectroscopy it is electrons that are excited), and hence excited to a higher energy level. The same wavelength radiation is also emitted by the electron when relaxing to ground energy level. So, you are right, there is no net loss of energy when is excited and relaxes back to ground state.

Cheers,

abhigyan
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Is there any good refereence

Is there any good refereence for clarifying this topic?

Dr. Analytical
Dr. Analytical's picture
You should be able to find a

You should be able to find a description of these processes in any textbook on instrumental analysis.  The introductory chapters for spectroscopy should have more information.