How is an emission spectrum produced?

Question

And how is an absorption spectrum produced

Answer 1

From Wikipedia:

"Emission spectroscopy is a spectroscopic technique which examines the wavelengths of photons emitted by atoms or molecules during their transition from an excited state to a lower energy state. Each element emits a characteristic set of discrete wavelengths according to its electronic structure, by observing these wavelengths the elemental composition of the sample can be determined.

The simplest method is to heat the sample to a high temperature, after which the excitations are produced by collisions between the sample atoms. This method is used in flame emission spectroscopy, and it was also the method used by Anders Jonas Ångström when he discovered the phenomenon of discrete emission lines in 1850s.

Although the emission lines are caused by a transition between quantized energy states and may at first look very sharp, they do have a finite width, i.e. they are composed of more than one wavelength of light. This spectral line broadening has many different causes."



Absorption Spectrum:

"The most straight-forward approach to absorption spectroscopy is to generate radiation with a source, measure a reference spectrum of that radiation with a detector and then re-measure the sample spectrum after placing the material of interest in between the source and detector. The two measured spectra can then be combined to determine the material's absorption spectrum. The sample spectrum alone is not sufficient to determine the absorption spectrum because it will be affected by the experimental conditions—the spectrum of the source, the absorption spectra of other materials in between the source and detector and the wavelength dependent characteristics of the detector. The reference spectrum will be affected in the same way, though, by these experimental conditions and therefore the combination yields the absorption spectrum of the material alone."

Answer 2

hi buddy Arfzor, permit me clarify the reason to get atomic, band and non-end spectrum in info. surely this is going to likely be achievable to get all the spectrum at a stretch. whilst electron from a greater physically powerful capability point jumps to the decrease capability state, then that distinction capability is radiated as a single line with frequency given by ability of the expression v = E1 - E2 / h yet non-end spectrum is with the help of decelerated charged debris as they flow close to by ability of the certainly charged nucleus. consequently in non-end spectrum we've non-end history with colorations gradually changing suitable from violet to crimson. There is not any demarcation. No severe line or dark line interior the non-end spectrum. If we see some severe strains alongside with non-end colored history it ability we've the two at a stretch as 2 in a single. this could be incredibly understood in case of X ray spectrum. we've the two non-end and line mutually. Line spectrum is likewise popular as function spectrum. As this spectrum could provide an id of the objective cloth on which electron falls. Line spectrum is with the help of an atom. same way band spectrum is with the help of a molecule, So band spectrum is additionally named as molecular spectrum. Now your question. considering there are discrete capability levels we get basically some concentrated frequencies. consequently line spectrum. permit me remind you as quickly as back. non-end spectrum is with the help of deceleration of charged particle.

Answer 3

when energy is applied to a atom, its electrons absorb that energy and move to higher energy levels.......and its a natural tendency of any atom to stabalize itself........so the electrons release that absorbed energy in the form of photons(high energy electromagnetic radiation) and move back to their original energy levels.......the amount of energy released by the electrons is equal to the differnence between the two relative energy levels or E=hf, where E is the energy released, f is the frequency of the photon and h is plank's constant.............................when the photon is released, u can see it through a spectroscope.....................and there is the emission spectra of that pertcular element!!!!!!!!!!!!!!!