Helium Neon Laser
A look at what is currently available on eBay
 JDS Uniphase Helium-Neon Lasers PSU 101T-1250-4-TTL-2 US $89.99 
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 Melles Griot Helium-Neon Laser Head 3230H-PC US $450.00
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 Melles Griot 05-LHP-991 BH3-3210-030 Helium Neon Laser Head CV1 US $399.99
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Physics Help... The speed of light in a vacuum is 2.998 x 10^8 m/s. The light emitted by a helium neon laser..?
has frequency 4.738 x 10^14 Hz. What is the wavelength of the light in nanometers (nm= 10^-9m)? Use three significant figures.
λ = c/f
λ = (2.998 * 10^8)/(4.738 * 10^14)
λ = 6.33 10^(-7) m
λ = 633 nm
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April 19th, 2005 in
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