Intensity Stability Comparison Between Different Colors of Laser Pointer

Different source of light can be used as a main in an open path optical method. Sunlight, tungsten lamp, LED, laser, mercury vapor lamp and halogen are the example source.It is important to test stability avoid inaccuracy measurement. The purpose this project determine which color laser has higher stability. Once switched on, intensity changes slowly until it comes stable state. Each different counts set pointer included blue, violet, red green color. An method experiment. A will whilespectrometer act detector. for each reported paper where standarddeviationforeachcoloriscalculated todetermined whichcolorhaveahigherstability.The standard deviation smallest value among these four colors 15.97.Colorwithsmallerstandarddeviationhasthehigheststability.