A carbon dioxide laser is an infrared laser. A CO laser with a cavity length of 48.6cm oscillates in the m=100,000.0 mode. What is the wavelength of the laser beam?

Question

b). What is the frequency of the laser beam?

Answer 1

Is this a CO laser or a CO2 laser?
I have never heard of a CO laser.

If m is the number of half waves bewtween the cavity mirrors, the wavelength is 48.6 cm/50,000
= 9.72*10^-4 cm
= 9.72*10^-6 m
= 9.72 microns

This is one of several possible CO2 laser wavelengths.

See
http://en.wikipedia.org/wiki/Carbon_dioxide_laser

Answer 2

(b) For the frequency, divide the speed of light by the computed wavelength.