单摆的研究实验报告_单摆实验报告误差分析_随机误差的统计分布单摆实验报告(5)
被测条纹数
mm
|a-a′|
∆x1234568.0953.5548.0303.5508.1843.5933.5758.0353.5738.1003.6808.0801010101010104.5204.4814.4574.5504.5044.4870.45200.44810.44570.45500.45040.4487∆x = 0.44998mm
测 d 数据记录
mm
次数放大像间距 d1a1a1′缩小像间距 d2|a1-a1′| a2a2′
|a2-a2′|1234567.5605.7717.5385.7557.5205.7355.7747.5615.7667.5495.7537.5151.7861.7901.7721.7941.7671.7807.3576.9337.3816.9107.3556.9516.9657.3606.9687.3306.9407.3600.4100.4280.4130.4200.4150.409
d1= 1.7915mm; d2= 0.4158mm测 D 数据记录
mm狭缝位置 b1
(1) ∆x 的不确定度测微目镜差丝位置 b′660
∆D=|b-b′|659uA( ) = 0.001329mm;
( ) 2
2uB( )=仪3= 0.005770mm;uuA( x) + u x0.005921mm。=B( ) =(2) 求 d1与 d2的不确定度uA( ) = 0.004288mm;
uA( ) = 0.002915mm;
∆uB( ) = 0.007mm; uB( ) = 0.005mm; uB( ) =仪=0.005770mm;3( )u22(1)+ u ( ) ==uA(d1) + u d2B2B0.01003mm;u( )=u d( ) +u d( )+ uB( ) = 0.00817mm。A2B2(3) 求 D 的不确定度u( ) = 1mm。(4) 波长的合成相对不确定度2
2
2ucλ( )=⎛u( )⎞⎟ +⎛u( )⎞⎟ +⎛u( )⎞⎟ =×−4mm;λ⎜⎝2∆x⎠⎜⎝d2⎠⎜⎝D
2⎠4.128 10⎛ u( ) ⎞其中 ⎜ ⎟ =1 ⎛ u( ) ⎞⎜⎜ ⎟⎟+1 ⎛ u( ) ⎞⎜⎜ ⎟⎟=×−5⎝d⎠4 ⎝d1⎠4 ⎝d2⎠1.374 10mm。(5) 测量结果
1 由
λ =d∆x 求得D( )
-4λ = 5.87731×10 mm。7
U = 2uc( )结果表达式为2uc= 2.427 ×10− mm;包含因子 k = 2 时, λ 的扩展不确定度−4λ = λ + U = (5.877 ±×0.005) 10mm。
没有发财的