Intensity of reflected light and index of refraction

[Fu-Kwun Hwang]

For normal incident light from air to glass, only 4% light were reflected.
I=(n1-n2)²/(n1+n2)²=(1-1.5)²/(1+1.5)²=1/25=4%
The intensity of reflected light changed with index of refraction and the incident angle.

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