Measuremellt of accurate spa/wi distribution of temperature and temperclfllre flltclIlarion ill aflame is importam to study the cO/llbu~·tiol/ process ill detail. IlIlhis paper first we have presented nreasuremellt of temperarure profile of a gaseous fla/llf! of {I /Wodimellsional slot burner. The erm,.~, due to halu effect in the measuremellts oltemperature are minimized by correcting the width ofthe/rillges. Further single e).posure speckle photography is used to study temperarurej1uctlf(ltion illside thej1ame. The 3-D plot of temperature fluctuation for differem fuel flow rates of air alld aeety/elle at different vertical heights above the mouth of the bumer with distance from the one elld of the .burner is also presented.

Double exposure speckle photography has been used for determining temperature profile of the burner. Further we have investigated single exposure speckle photography for measuring temperature fluctuations. These studies show that laser speckle photographic technique can provide complete solution to measure the temperature, temperature profile and temperature