用透射光栅测定光波波长数据.doc

实验数据处理1、测量光栅常量测量次数 绿色光谱线角坐标衍射角衍射角平均值 K=-1 K=+11286.0'106.2'247.45'67.45'19.13°19.16°2286.2'106.4'247.43'67.43'19.17°3286.3'106.5'247.42'67.41'19.19° 1664.84nm2、测量光波波长谱线颜色测量次数光谱线角坐标衍射角波长平均波长K=-1 K=+1紫1281.55'101.55'251.39'71.39'15.134°434.65434.332281.52'101.52'251.37'71.37'15.127°434.453281.53'101.53'251.40'71.40'15.107°433.89黄内1287.9'107.9'246.36'66.35'20.279°577.02577.182287.12'107.12'246.37'66.37'20.292°577.373287.10'107.10'246.36'66.36'20.284°577.15黄外1287.15'107.15'240.30'66.30'21.875°620.29620.502287.18'107.18'240.31'66.31'21.892°620.743287.16'107.16'240.30'66.30'21.882°620.47与教材P3给出的相应波长进行比较3、测定光栅的角色散黄(内)：φ=20.285°黄(外)：φ'=21.883°Δφ=φ'-φ=1.598°D=Δφ/Δλ=0.0369°/nmD=1/(dcosφ)=0.000601(°*nm)ˆ­1所测得的实验数据要比可见光的波长大一些，可能是①实验中读数不准确②实验仪器所带的误差③初始调试时没有调试准确，也有别的误差来源。