Homework Help: physics

Posted by jack on Sunday, January 30, 2011 at 8:29pm.

Modern lasers can create a pulse of light that lasts only a few femtoseconds.
(a) What is the length of a pulse of red light that lasts 6.2 fs?
(b) How many wavelengths of red light (ë = 680 nm) are included in such a pulse?

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