The New Tired Light Theory (NTL) is tested by using known data of the distance to the Corona Borealis galaxy cluster (A2065 in particular) and from this predicting the redshift of the galaxy. The predicted value is then compared to the measured value. In NTL, photons of light are continually absorbed and re-emitted by the electrons in the plasma of intergalactic space which recoil both on absorption and re-emission. Energy is transferred from the photon to the recoiling electron and thus the photon energy is reduced, the frequency is reduced and the wavelength is increased. It is redshifted. Using the wavelength of the ‘K line’ of ionised calcium, standard physics and published collision cross-sections, the predicted redshift by NTL is found to be . This compares favourably with the measured redshift value of - they agree to within 6%. In NTL the energy transferred to the recoiling electron is emitted as secondary photons. The predicted wavelength of these secondary photons is calculated and is shown to be in the microwave region of the electro-magnetic spectrum. This again is consistent with the NTL prediction that these secondary photons form the CMB.
