中3物理!求折射角一問

2011-01-12 3:27 am
光線從空氣中進入酒精,入射角35°,求折射角(酒精折射率為1.36)

n=sini

sinr

sinr=sin35÷1.36

sinr=0.423

r=25°
有無錯?
我同fd都計到25,但係本書寫37,到底係25定37?
(順便如果我條公式有問題幫我睇埋--')
雖然無圖睇,但都幫幫手,有10點

回答 (2)

2011-01-12 3:38 am
✔ 最佳答案
Your calculation is correct.

The answer given in your book is surely wrong. The refractive angle should not be greater than the incident angle when light travels from a less dense medium (air) to a denser medium (alcohol).
2011-01-12 5:20 am
你確定入射角35°沒錯。

因為這樣是算到37°
sinr*1.36=sin55°*1
sinr=sin55°/1.36
r= 37°
因為sin i是90°-35°=55°

公式按道理是沒錯

參考: 自己


收錄日期: 2021-04-29 17:38:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110111000051KK01119

檢視 Wayback Machine 備份