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Color of light emitted is characteristic to element

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Each element has a different set of energy levels. Explain why the colour of the light emitted by an element in the gaseous state is characteristic of the element & explain with a sketch diagram how a hydrogen atom, which has only one electron, has so many spectral lines.

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Each element has a different set of energy levels. Each element has a characteristic pattern of spectral lines that are due to the properties of that element ? its ability to become excited ...

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This solution explains the color of light emitted and how it is characteristic to each element. The expert sketches the diagram to show how a hydrogen atom and an election travel in a spectral line.

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Continuous Spectrum, Emission Spectra Lines; Absorption Bands; Intensity Distribution; Wien's Law etc.

Please answer using the attached data, procedure and graphs. Thanks.

1. Identify those which show what appears to be a continuous spectrum, those with emission spectra lines, those with absorption bands, and those with absorption spectral lines (these categories not being exclusive).

Extra Credit: The spectra of hydrogen, helium, and calcium are present. Try to find these spectra in a reference in order to identify these three.

2. Consider the plots of the intensity distributions for light from the bright side of the Earth, Mars, and Phobos shown below. The lower axis is plotted in wavenumbers (k), defined by k = 1 / λ. Note that when Iλ is plotted as a function of k, Wien's Law takes on a slightly different form from that given above, becoming (see attachment) where kmax is the wavenumber k when Iλ is maximum. Assume the smooth curves drawn above the measured intensities are blackbody distributions (with loss below that curve identifiable as due to gas absorptions), find the peak of the smooth curves, determine the wavelength of those points, and use Wien's law to estimate the radiation temperature of each body.

3. Note the absorption in the spectrum of the Earth's atmosphere identified by carbon dioxide (CO2), ozone (O3), and H2O. Which of these three gases shows in the spectra of the atmosphere of Mars?


Likely gases showing in the displayed spectra for the atmosphere of Mars: CO2, O3, H2O

Why do you think Phobos shows no gas absorption?

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