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Some of the letters in the equation are not defined. —Preceding unsigned comment added by 87.69.68.155 (talk) 03:34, 30 November 2007 (UTC)
Is there a mistake in the Spectral Shift section?
"...hence the wavelength varies proportionally to injected current."
While the equation shows a square root dependence on the current. —Preceding unsigned comment added by 87.114.171.174 (talk) 16:52, 21 June 2008 (UTC)