In this thesis, we experimentally tested the interactions of cold clouds of rubidium atoms 87Rb with light inside a high-fineness optical resonator, and the possibility of resonator cooling in processes analogous to sub-Doppler cooling of atoms using continuous wave lasers. An atomic cloud, pre-cooled to sub-Doppler temperatures, using standard continuous laser cooling techniques in a magneto-optical trap, was introduced into the center of the optical resonator and then released from the trap to interact freely with the optical potential inside the resonator. The interaction was examined by imaging of cloud fluorescence in the time of flight method. Tests of the interaction, in the longitudinal pumping regime, with a continuous wave laser near atomic resonance have shown the effect of partial trapping of atoms from the cloud, but lack of sensitivity on laser detuning from the resonator line indicates the absence of additional cooling effects. The experiment was repeated by pumping the cavity with a frequency comb with frequency near rubidium atomic resonance. Signature of comb-atom interaction in the cavity was recorded, but no cooling effect on the atoms by multimode comb excitation of the cavity was observed in the cloud fluorescence.