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Re: Wavelength of He-Ne laser



Sorry if this is a stupid question, but the textbooks all say the
wavelength of He-Ne lasers is 632.8 nm; so why does my little $25 laser
pointer I carry to lecture say its wavelength is 670 nm?

Thanks in advance,
Larry

It is a gallium arsenide (GaAs) diode laser, not a He-Ne gas laser.

Leigh

Ahhhh!!! That would explain it. Thanks.

Larry