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Fu-Kwun Hwang
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Posts: 3085   « Embed this message on: March 17, 2006, 09:22:18 am » posted from:Taipei,T'ai-pei,Taiwan This applet will calculate reflected and refracted light intensity according to the incident angle for p-wave and s-wave.
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There are always reflected wave when light touch the boundary between two media.
The intensity for reflected wave $\vec{E}'= r_s \vec{E}_s + r_p \vec{E}_p$ where $\vec{E}_s, \vec{E}_p$ are electric field for s-wave and p-wave. $r_s= \frac{n_1\cos\theta_1 -n_2\cos\theta_2}{n_1\cos\theta_1 +n_2\cos\theta_2} =\frac{\sin(\theta_1-\theta_2)}{\sin(\theta_1+\theta_2)}$
and $r_p=\frac{n_2\cos\theta_1-n_1\cos\theta_2}{n_2\cos\theta_1+n_1\cos\theta_2}=\frac{\tan(\theta_1-\theta_2)}{\tan(\theta_1+\theta_2)}$
The intensity of refraction wave is the intensity of incident wave minus intensity of reflected wave.
There is no refracted wave when internal reflection occurs.
When $\theta=\theta=0$, the fraction of reflected wave is $\frac{(n_1-n_2)^2}{(n_1+n_2)^2}$.
for light from air(n=1) to glass (n=1.5), there are only $\frac{(1-1.5)^2}{(1+1.5)^2}=\frac{0.5^2}{2.5^2}=\frac{1}{25}=4%$ light being reflected. Logged
minusquare
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Posts: 3 « Embed this message Reply #1 on: October 16, 2007, 12:33:43 pm » I downloaded and unzipped.But i am unable to open unzipped file.I can however view it online from your wesite.Please guide.
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Fu-Kwun Hwang
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Posts: 3085   « Embed this message Reply #2 on: October 16, 2007, 04:37:51 pm » I just use "send to my email account" method, and open the file from my email message without any problem.
May be there is something wrong with your computer? Try to use another computer to check it again. Logged
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