Practice Question: An anaesthesia analyzer works by inserting anaesthetic gases into a cell which is inside the cavity of a small air-cooled argon-ion laser. The resulting Raman emissions are then analyzed with a spectrometer. The argon-ion laser (with parameters in section 8.2.1 of Laser Modeling) has a gain length of 10cm and an attenuation length of 25cm. Each cavity mirror is an HR with a reectivity of 99.8%. At maximum concentration, gases in the cell will absorb radiation at 0.0076cm'1. Calculate the maximum length of the intra-cavity cell which will still allow the laser to oscillate