  High temperature radiating Air is produced experimentally by focusing a shock
wave with the help of a spherically converging test section attached to a shock
tube. The converging section concentrates the shock to a point with minimum
diffusion losses. A shift in radiation towards the UV region was observed with
an increase in the strength of the focusing shock wave. The atomic and
molecular emission was observed from the radiation spectrum. Along with the
emission from molecules of Air, emissions from contaminations were also
observed. The temperature of the radiating gas was estimated using the
blackbody radiation curve and was observed to be 13000 K.
