All Questions
4
questions
3
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5
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Variations in Refractive Index of Materials
It's quite a common fact that different types of glass have different refractive indices. Most sites I've found attribute these differences to variations in the 'density' of the glass, which is not ...
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4
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How can the speed of light in matter be measured?
Experiments such as Focault's measure speed of light in matter. Focault's experimental set-up is based on the idea that it takes more time for light to travel through matter, which will result in the ...
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4
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2
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Are there any real-world examples of refraction of light by magnetic permeability?
The question Fresnel Transmission Coefficient for Magnetic Field is interesting.
Thinking about it led me to reflect upon what little I know of the history of optics, with refraction by lenses and ...
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Refractive index in metamaterials [duplicate]
Why do metamaterials have $n<0$?
They are defined to be those materials with $\varepsilon <0$ and $\mu<0$, but the definition of the refractive index is
$$n=\sqrt{\frac{\varepsilon\mu}{\...
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