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<title>Emission and Absorption Spectra</title>
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function updateTop() {
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<h2><font color="blue">Draw a Spectrum from 380 nm to 780 nm</font></h2>
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<pre>
Select a resolution and the type of spectrum you want displayed
then click the "Submit" button. There may be a delay of several
seconds while your browser calculates the spectrum. A high
resolution spectrum takes longer to calculate.
<form name="spectrum">
<b>Select a Resolution</b>
<input type="radio" name="res" value="400" checked> For 401 horizontal pixels with a resolution of 1 nm/pixel
<input type="radio" name="res" value="800"> For 801 horizontal pixels with a resolution of 0.5 nm/pixel
<b>Select a Spectrum</b>
<input type="radio" name="spec" value="continuous" checked> Continuous emission
<input type="radio" name="spec" value="h_absorption"> Hydrogen absorption
<input type="radio" name="spec" value="h_emission"> Hydrogen emission
<input type="radio" name="spec" value="he_emission"> Helium emission
<input type="radio" name="spec" value="li_emission"> Lithium emission
<input type="radio" name="spec" value="na_emission"> Sodium emission
<input type="radio" name="spec" value="k_emission"> Potassium emission
<input type="button" value="Submit" onClick="updateTop();"> <input type="reset" value="Reset">
</form>
</pre>
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