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Early Quantum Physics and the Photon

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg:: ::/sites/dl/free/0070524076/57981/open27.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (14.0K)</a> The police respond to a call and find an empty motel room that looks clean in normal light. A detective sprays a colorless liquid on the walls and floor, closes the blinds, and turns off the lights. In the dark she sees spots on the floor that give off a blue glow. The detective tells a uniformed officer to cordon off the room as a possible crime scene. What causes the blue glow? Why does the detective suspect that a crime took place in the room?









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