试题与答案

在用光具座研究凸透镜成像规律的实验中: (1)测量凸透镜的焦距如图所示,则该凸透

题型:实验题

题目:

在用光具座研究凸透镜成像规律的实验中:

(1)测量凸透镜的焦距如图所示,则该凸透镜的焦距约为________cm.

(2)将蜡烛、凸透镜、光屏依次从左向右放在光具座上.点燃蜡烛后,调节烛 焰、凸透镜、光屏的中心大致在__________上.

(3)当烛焰距凸透镜30cm时,移动光屏,可在光屏上得到一个清晰的倒立、________的实像.生活中使用的_________就是利用这一成像规律工作的(填一光学仪器).

(4)在(3)中移动光屏成清晰像后,拿走光屏,再将蜡烛放在光屏位置处,则此时光屏应放在_________位置才能成清晰的像,此现象说明凸透镜的光路是__________的。

答案:

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