The Rotation Spectrum of the HCl Molecule Has Been Observed $\mu$

Multiple Choice

The rotation spectrum of the HCl molecule has been observed in the far infrared, around 50 * 10-6 m.The spacing between successive lines in the spectrum corresponds to radiation of wavelength equal to 5 microns (1 $\mu$ m = 10-6 m) .Determine the frequency of the photon associated with this transition.

A) 6 *1014 Hz
B) 6 *1012 Hz
C) 6 * 1011 Hz
D) 6 * 1013 Hz
E) 6 * 1010 Hz