试求能产生红光 [tex=4.929x1.357]X2+i+FYDXa7P4wxOk7JWf5W4BCG5Nk+BeIodbpiyM8I=[/tex] 的二级反射干涉条纹的肥皂薄膜厚度。已知肥皂膜的折射率为 [tex=1.786x1.0]yk9QIbX4coD3qJHkSoeW2g==[/tex], 且平行光与法向成 [tex=1.429x1.071]L5k7nybP7cb4P5LvpnaDAQ==[/tex] 角人射。
举一反三
- 以下程序的输出结果是() main( ) { int i , x[3][3]={9 , 8 , 7 , 6 , 5 , 4 , 3 , 2 , 1} , *p=&x[1][1] ; for(i=0 ; i<4 ; i+=2) printf("%d " , p[i]) ;
- Public Sub Proc(a%( )) Static i% Do a(i) = a(i) + a(i + 1) i = i + 1 Loop While i < 2 End Sub Private Sub Command1_Click( ) Dim m%, i%, x%(10) For i = 0 To 4: x(i) = i + 1: Next i For i = 1 To 2: Call Proc(x): Next i For i = 0 To 4: Print x(i);: Next i End Sub A: 3 4 7 5 6 B: 3 5 7 4 5 C: 2 3 4 4 5 D: 4 5 6 7 8
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
- 设X,Y为两个随机变量,且P{X ³0,Y ³ 0} = 3/7 , P{X ³ 0} = P{ Y ³ 0} = 4/7 ,则P{max(X, Y) ³ 0} = ( ). A: 1/7 B: 3/7 C: 4/7 D: 5/7
- 已知离散型随机变量X的分布列为P(X=k)=k/15,(k=1,2,3,4,5),则P(X≥3)=( ) A: 3/5 B: 2/5 C: 4/5 D: 7/15