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#Mon Aug 09 12:05:15 CEST 2010
Text__mC4FMKOdEd-WfYQ0GneCwQ_title=Philipp Lenard's Cathode Ray Tube for Examining the Photoelectric Effect
Text__mC4FMKOdEd-WfYQ0GneCwQ_text=<p>Lenard examines cathode rays and the photoelectric effect for many years.</p><p>He determines that the voltage arising from the photoelectric effect is not, as expected, dependent on the intensity but on the wavelength of the light.</p>