ABSTRACT This master’s project based on the review of the radiation of air produced from a nanosecond laser interaction with air plasmas. In the study Nd: YAG at a wavelength of 1064 nm with pulse duration 6ns was used to create air plasmas. The plasmas parameters (electron density and temperature) of air plasmas were quantified using the NIST data base standard techniques. Based on the plasmas parameters, the spectral profile of emitted plasmas  N and O are quantified and showed the dominant line. The electron density from the literature point of view is estimated from an isolated ion of Nitrogen or Oxygen ion density at 0.1µsis approximately is 1.3x10 , after energy increase the density was also increase and reaches a maximum value 1.7x10 and the electron temperature is estimated from the Boltzmann plot of successive ions stages of nitrogen. The electron temperature estimated 23400 k for Key words: laser, plasma, spectrum . N and 26600k for  O   . 16 cm 17 -3 cm -3