Abstract: Solar radiation can be used as an effective tool to determine atmospheric composition and thus indoor / lower tropospheric irradiance modelling can be done. Here is a case study of an area ( Lab3,dept of physics, NTU,NT road, Bangalore, Karnataka, India).This study helped to identify the radicals / ions active in spectral region, 400 to 700 0A .If hazardous radicals of medical concern are found precautionary measures can be taken by intimating residents of this area to take caution.

| DOI: 10.17148/IARJSET.2022.9289