refractive index of medium的意思

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a glass block of lenth 18cm and refractive index 1.5 contain a glass block of lenth 18cm and refractive index 1.5 contains a small air bubble viewed from one side the bubble appears to 8cm from this side,how far in the block will it appear to be when viewed from the opposite side? ilovesk231年前1: sherrychai 共回答了24个问题 | 采纳率95.8%

题目翻译：
玻璃块长度18CM和折射率1.5包含一个小的气泡
从一个侧面观察泡沫似乎8cm这一边,在多远
块将它似乎是从反面看的时候?
解析：
这个题目和水中物体的实际深度本质上是一样的.
实际上可以想见根据观察角度的不同,“看起来”的深度应该是不同的.设“看起来”的深度y',实际深度y,光线在水中的入射角为i,那么根据斯涅尔定律你可以推出：
y'=y * Sqrt[1-n^2 *sin^2(i)]/[n *cos(i)],当i比较小时有近似的y'=y/n.
你可以根据这个网站的图示自己来推导,比较容易.

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英语翻译[1] Nixon WS.Pupil size in refractive (letter).J Catarac 英语翻译 [1] Nixon WS.Pupil size in refractive (letter).J Cataract Refract Surg 1997;23:1435–6. [2] Holladay JT,Lynn MJ,Waring III GO,et al.The relationship of visual acuity,refractive error,and pupil size after radial keratotomy.Arch Ophthalmol 1991;109:70–6. [3] Colvard M.Preoperative measurement of scotopic pupil dilation using an office pupillometer.J Cataract Refract Surg 1999;24:1594–7. [4] Boxer Wachler BS,Krueger RR.Agreement and repeatability of infrared pupillometery and the comparison method.Ophthalmology 1999;106:319–23. [5] Bland JM,Altman DG.Statistical methods for assessing agreement between the two methods of clinical measurement.Lancet 1986; 1:307–10. [6] Altman DG,Bland JM.Measurements in medicine:the analysis of method comparison studies.Statistician 1983;32:307–18. [7] Loewenfeld IE.The pupil.Anatomy physiology and clinical applications, vol.1,first ed.Ames:Iowa State University Press,1993[chapter 15]. [8] Baron WS,Munnerlyn C.Predicting visual performance following excimer photorefractive keratectomy.Refract Corn Surg 1992;8:355– 62. [9] Verdon W,Bullimore M,Maloney RK.Visual performance after photorefractive keratectomy:a prospective study.Arch Ophthalmol 1996;114:1465–72. [10] Kohnen T,Terzi E,Buhren J,Kohnen EM.Comparison of a digital and a handheld infrared pupillometer for determining scotopic pupil diameter.J Cataract Refract Surg 2003;29(1):12–117. [11] Boxer Wachler BS.Effect of pupil size on visual function under monocular and binocular conditions in LASIK and non-LASIK patients.J Cataract Refract Surg 2003;29:275–8. [12] Rosen ES,Gore CL,Taylor D,et al.Use of a digital infrared pupillometer to assess patient suitability for refractive surgery.J Cataract Refract Surg 2002;28:1433–8. [13] Schnitzler E-M,Baumeister M,Kohnen T.Scotopic measurement of normal pupils:Colvard versus Video Vision Analyser infrared pupillometer. J Cataract Refract Surg 2000;26:859–66. 专业点，不要用在线翻译器那种玩意糊弄我 ps：pupil是瞳孔的意思！ wjk8881年前1: meitor 共回答了18个问题 | 采纳率88.9%

1 ] 尼克松WS .学生大小在折射(信件) .J 大瀑布折射Surg 1997;23:1435-6 .
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[ 3 ] 暗视力的学生扩张的Colvard M.Preoperative 测量使用办公室pupillometer .J 大瀑布折射Surg 1999;24:1594-7 .
[ 4 ] 拳击手Wachler BS,Krueger RR .协议和反复性红外pupillometery 和比较方法.眼科学 1999;106:319-23 .
[ 5 ] 平淡JM,Altman DG .统计方法为估计协议在临床测量之间二个方法.柳叶刀1986 年; 1:307-10 .
[ 6 ] Altman DG,平淡JM .测量在医学:分析方法比较研究.统计员1983;32:307-18 .
[ 7 ] Loewenfeld IE .学生.解剖学生理和临床应用,卷1,第一编辑.Ames:衣阿华州立大学出版社,1993[chapter 15] .
[ 8 ] WS,Munnerlyn C.Predicting 视觉表现随后而来男爵 excimer photorefractive keratectomy .折射玉米Surg 1992;8:355- 62.
[ 9 ] Verdon W,Bullimore M,Maloney RK .视觉表现以后 photorefractive keratectomy:一项预期研究.曲拱Ophthalmol 1996;114:1465-72 .
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[ 11 ] 拳击手Wachler BS .学生大小的作用在视觉作用下 monocular 和双眼条件在LASIK 和non-LASIK 患者.J 大瀑布折射Surg 2003;29:275-8 .
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[ 13 ] Schnitzler E-M,Baumeister M,Kohnen T.Scotopic 测量正常学生:Colvard 对录影视觉分析仪红外线pupillometer .J 大瀑布折射Surg 2000;26:859-66 .

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一道有关光学的计算题The refractive index of core and cladding for a 1k 一道有关光学的计算题 The refractive index of core and cladding for a 1km length single mode fiber is 1.47 and 1.45 respectively.The time taken for the light to travel in this fiber is qiwang19761年前1: rtdydfyd 共回答了26个问题 | 采纳率92.3%

alright,i'm a little drunk now,but i can still answer your question:
internal total reflection condition:
n1sin p=n2 sin pi/2 ===> sin p=0.98639455782312925170068027210884
total time = (L/sin p) /(c/n2) =(1000/0.98639455782312925170068027210884)/(299792458/1.45)=4.9033921994128363799714010012292e-6

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refractive index of medium的意思

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