(1)实验前,应调整蜡烛、凸透镜和光屏的高度,使烛焰、凸透镜、光屏三者的中心大致在
(2)此时烛焰的成像特点与
(3)实验时,若一只苍蝇落在了凸透镜上,光屏上
(4)小明将一副远视眼镜的镜片放在蜡烛与凸透镜之间且靠近凸透镜的地方,若保持光屏的位置不变,仅将蜡烛向
同类型试题
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
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