The red light of a He-Ne laser has a wavelength of about 633nm. What is its frequency?

1 Answer
Mar 21, 2018

See Below

Explanation:

The speed of light (in a vacuum and all that), c, has associated with it frequency, ν, and wavelength, λ. Wavelength is in meters, and frequency has units of #s^"-1"#.

Speed of Light
#c=λν# = #3.00xx10^8 m/s#

Wavelength of Light:
#λ=c/ν#

Frequency of Light:
#ν=c/λ#

#633nm xx ("1m"/(10^9nm))# = #6.33x10^-7 m#

Frequency:
#ν=c/λ# = #(3.00xx10^8 m/s)/(6.33x10^-7 m)#
#v = 4.74xx10^14 s^-1#