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Atoms can store energy by going into excited states
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As we have seen before, atoms interact by attracting each other, except that when they get too close they bounce off and go their separate ways. But something strange can happen when two atoms collide -- something you haven't seen before! In the model below, try changing the speed of the blue atom, using the slider, and see if you can get anything unusual to happen.
What you should do
Try different settings on the slider and click the Run button to experiment with different speeds. When you think you've explored the behavior of the model completely answer the questions below.
OK, here's a question for you to think about before you move on to the next page. You know that energy is always conserved, right? Well, when the atoms suddenly move slowly after they collide, what happens to the energy???
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<b><font size="5" face="Trebuchet MS">Atoms can store energy by going into excited states</font></b>
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Speed of blue atom (in 100 m/s)
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<html><font size=5><b>Run</b></html>
Run
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Execute MW script
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Hint
Try setting the blue atom's speed to 1200 m/s.
Hint
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<font size="4">Did you notice a difference in the behavior of the atoms as
you changed the velocity of the moving one? </font>
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<a href="script:textbox:2:load correct1.html"><font size="4">Yes</font></a>
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<a href="script:textbox:2:load incorrect1.html">No</a>
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<font size="4">When the green atom has that "halo" around it we say it is
"excited." What is the minimum speed the blue atom must have in order to
excite the green atom?</font>
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<a href="Page1.cml"><img src="previous.png" border=0></a>
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<a href="index.cml"><img src="index.png" border=0></a>
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