![](http://static.xuejinqu.com/qimg/5b6/5b684d063c01aba1ee4c949503186b1b.png)
(1)实验前,应调整烛焰、凸透镜和光屏三者的中心大致在
(2)当各器材位置如图所示时,在光屏上成烛焰清晰的像,此时烛焰的成像特点与
(3)实验时,若用一张纸片遮住了凸透镜的上半部,光屏上
(4)小华将一副老花镜的镜片放在烛焰与凸透镜之间且靠近凸透镜的位置,若保持蜡烛的位置不变,仅将光屏向
![](http://static.xuejinqu.com/images/y-prise.png)
同类型试题
![](http://static.xuejinqu.com/images/medal.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)