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第14章 光学 电磁波 相对论第4讲 实验用双缝干涉实验测光的波长_4.2025物理总复习_2025年新高考资料_一轮复习_2025人教版新教材物理高考第一轮基础练(完结)

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第14章 光学 电磁波 相对论第4讲 实验用双缝干涉实验测光的波长_4.2025物理总复习_2025年新高考资料_一轮复习_2025人教版新教材物理高考第一轮基础练(完结)
第14章 光学 电磁波 相对论第4讲 实验用双缝干涉实验测光的波长_4.2025物理总复习_2025年新高考资料_一轮复习_2025人教版新教材物理高考第一轮基础练(完结)
第14章 光学 电磁波 相对论第4讲 实验用双缝干涉实验测光的波长_4.2025物理总复习_2025年新高考资料_一轮复习_2025人教版新教材物理高考第一轮基础练(完结)

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2025人教版新教材物理高考第一轮 第 4 讲实验 : 用双缝干涉实验测光的波长 1.(2023江苏四地统考二模)对于以下的光学现象说法正确的是( ) A.图甲是双缝干涉示意图,若只增大两个狭缝S 、S 间的距离d,相邻亮条纹间距离Δx将 1 2 增大 B.图乙是单色光单缝衍射实验现象,若在狭缝宽度相同情况下,图乙中上面图对应光的波 长较短 C.图丙是用干涉法检测工件表面平整程度时得到的干涉图样,弯曲的干涉条纹说明被检测 的平面在此处是凸起的 D.图丁中的P、Q是偏振片,当P固定不动,缓慢转动Q时,光屏上的光亮度将一明一暗交 替变化,此现象表明光波是纵波 2.(2021浙江卷)“用双缝干涉测量光的波长”实验的装置如图所示。实验中: (1)观察到较模糊的干涉条纹,要使条纹变得清晰,值得尝试的是 。 A.旋转测量头 B.增大单缝与双缝间的距离 C.调节拨杆使单缝与双缝平行 (2)要增大观察到的条纹间距,正确的做法是 。 A.减小单缝与光源间的距离B.减小单缝与双缝间的距离 C.增大透镜与单缝间的距离 D.增大双缝与测量头间的距离 3.(2024浙江模拟)某同学在实验室用黄光做“双缝干涉测量光的波长”实验的器材如图 甲所示,观察到如图乙所示的干涉条纹,图乙中灰色部分表示暗条纹,于是他使分划板中心 刻线与暗条纹中心对齐,移动测量头进行测量,下列说法正确的是( ) A.该同学测条纹间距时必须将分划板中心刻度线与亮条纹中心对齐 B.在实验过程中拿掉双缝,将观察不到明暗相间的条纹 C.该干涉条纹虽然倾斜,但测得的波长值仍正确 D.若需得到竖直的条纹与分划板刻度线平行只需逆时针转动测量头即可 4.某实验小组使用图甲的装置测量某红色激光的波长。用光具座固定激光笔和刻有双缝 的黑色纸板,双缝间的宽度d=0.2 mm。激光经过双缝后投射到光屏中的条纹如图乙所示, 由刻度尺读出A、B两亮纹间的距离x= mm。通过激光测距仪测量出双缝到投影 λ Δx 屏间的距离L=2.0 m,已知 = (Δx为相邻两条亮纹间的距离),由此则可以计算该激光 d L 的波长λ= m。如果用紫色激光重新实验,相邻亮纹间距会 (选填“变 大”“变小”或“不变”)。参考答案 第4讲 实验:用双缝干涉实验测光的波长 l 1.C 解析 根据Δx= λ可知,只增大两缝距离d,相邻亮条纹间距离Δx将减小,A错误;由 d 图乙可知,上面图的衍射现象比下面图更明显,可知在狭缝宽度相同情况下,下图对应的光 波长较短,B错误;由图丙可知,条纹向空气薄膜较厚处发生弯曲,说明弯曲处的光程差变短, 空气薄膜间距变小,则被检测的平面在此处是凸起的,C正确;缓慢转动Q时,光屏上的光亮 度将一明一暗交替变化,表明光波是横波,D错误。 2.答案 (1)C (2)D 解析 (1)若粗调后看不到清晰的干涉条纹,看到的是模糊不清的条纹,则最可能的原因是单 缝与双缝不平行;要使条纹变得清晰,值得尝试的是调节拨杆使单缝与双缝平行。故选 C。 l (2)根据Δx= λ可知,要增大条纹间距可以增大双缝到光屏的距离 l,减小双缝的间距d;故 d 选D。 3.C 解析 该同学测条纹间距时分划板中心刻度线既可以与亮条纹中心重合也可以与暗 条纹中心重合,A错误;在实验过程中拿掉双缝,将观察到明暗相间的衍射条纹,B错误;该干 涉条纹虽然倾斜,但测得的波长值仍正确,C正确;若需得到竖直的条纹与分划板刻度线平 行只需顺时针转动测量头即可,D错误。 4.答案 65.0 6.50×10-7 变小 解析 刻度尺的最小刻度值为1 mm,由刻度尺读出A、B两亮纹间的距离为9.00 cm-2.50 cm=6.50 cm=65.0 mm x -x 65.0 相邻两条亮纹间的距离Δx= B A = mm=6.50 mm 10 10 λ Δx Δxd 6.50×10-3×0.2×10-3 由 = 可得λ= = m=6.50×10-7 m d L L 2.0 λ Δx 如果用紫色激光重新实验,由于紫色激光的波长较短,由 = 可知,d、L不变,则相邻亮 d L 纹间距会变小。
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  1. CONNECT:[ UseTime:0.000617s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000709s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001303s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000783s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000644s ]
  6. SELECT * FROM `set` [ RunTime:0.001718s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000630s ]
  8. SELECT * FROM `wendang` WHERE `id` = 373729 LIMIT 1 [ RunTime:0.000799s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 373729 [ RunTime:0.001909s ]
  10. UPDATE `wendang` SET `lasttime` = 1773120556 WHERE `id` = 373729 [ RunTime:0.001204s ]
  11. SELECT * FROM `wendang` WHERE `id` < 373729 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003284s ]
  12. SELECT * FROM `wendang` WHERE `id` > 373729 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.005349s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 373729 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.011736s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 373729 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004320s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 373729 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004523s ]
0.119708s