Explore BrainMass

Explore BrainMass

    Emission Spectra

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    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?

    © BrainMass Inc. brainmass.com February 24, 2021, 2:48 pm ad1c9bdddf


    Solution Preview

    Hello and thank you for posting your question to Brainmass!
    The solution is attached below (next to the paperclip icon) in two formats. one is in Word XP Format, ...

    Solution Summary

    The 6 pages solution provides complete explanations regarding the different types of emission spectra from different elements and compounds.