A beam of light has a wavelength of 670nm in vacuum.
What is the speed of this light in a liquid whose index of refraction at this wavelength is 1.49?
Use 3.00×10^8 m/s for the speed of light in a vacuum.
v =? m/s
What is the wavelength of these waves in the liquid?
lambda = ? m
physics problem
2012-12-06 2:46 pm
回答 (1)
2012-12-06 4:19 pm
✔ 最佳答案
Refractive index n = speed in vacuum/speed in mediumhence, 1.49 = 3x10^8/speed in liquid
speed in liquid = 3x10^8/1.49 m/s = 2.013 x 10^8 m/s
Frequency of light in vacuum = 3x10^8/670x10^-9 Hz
Wavelength in liquid = 2.013x10^8/(3x10^8/670x10^-9) m = 450 nm
收錄日期: 2021-04-29 17:46:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121206000051KK00027