Hey people, just a short question about understanding: Why does a rather high IOR (like ~30) makes a material appear like a mirror? Is it because the light gets redirected so heavily that its a quasi mirror?
And the progressive reflectiveness when further and further increasing the IOR starting at 1.0? Is this caused by the fact that the light gets always partly transmissed and reflected and as the angles get more extreme, theres an ever decreasing probability of light "getting through" like from behind a body of glass for example? To show what i mean, using the default glass-shader in cycles:
The Khronos 3D Formats Working Group recently announced the ratification of three new Physically Based Rendering (PBR) extensions for the glTF 3D asset format: KHR_materials_volume, KHR_materials_ior, and KHR_materials_specular. These extensions will grant artists control of photorealistic effects in glTF, enhancing the appearance of 3D assets. This blog will explore how these extensions are implemented and which variables will be available for artists to control.
Greetings fellow labrats,
in the course of my studies i have to write a protocol, but I can't find the refraction index of cis-4-Cyclohexene-1,2-dicarboxylic acid, dimethyl ester, which i need. Can any of you help me out? :)
I would appreciate a lot!
Apparently refraction indexes can be lower than 1, and even negative and complex.
Doesn't this interfere with special relativity?
This is random but I am seriously so confused how these could ever relate? Like I thought focal length just depends on the radius of curvature...
Hello! I am looking for some information on high RI casting resin that I can buy. There is very little information online aside from niche scientific studies on various optical resins but nothing to purchase. Anyone know of a high RI art/casting resin available for purchase?
https://reddit.com/link/htgihq/video/d634rzto9mb51/player
Donβt make the mistake I did and guess the only answer that was impossible π€‘ (except maybe in theoretical physics or something)
Maybe I'm dumb but isn't this part of the equation needed for eye tracking? And maybe a stretch but the Index logo kinda looks like it could be a stylized diagram of the cornea, lens and retina.
I'm not really expecting eye tracking but at the same time I thought this was a bit hard to ignore considering how odd the name choice seems.
Hey guys, so I'm on the optics chapter, and the formula given for index of refraction (n) is:
n = c/v = Vvacuum / Vmedium
But then it says that as a light's wavelength increases, index of refraction decreases. They said this to detail how violet light would refract more than red light.
But if we do:
c = vn = Ξ»of
It appears that as wavelength increases, the n increases. And while it's true that the wavelength Ξ»o in the equation above is that in a vacuum, in a vacuum red light would still have a greater wavelength than violet light right? And if a greater wavelength = greater n, then shouldn't the red light have the greater index of refraction?!
Could someone shed some light on this? Thanks.
Hi! Could someone explain why the wavelength changes in a prism but frequency does not?
Also, if you could explain how the index of refraction and wavelength of different colors are affected by a prism, and how this causes the separation of color? I know that violet has the shortest wavelength, and so it travels slower through the prism, and thus refracts more than red, but I'm kind of confused on the "change in index of refraction" β doesn't a prism (which is made of glass), have only one index of refraction (i.e. n=1.5), so how can different colors have different indices of refraction??
I know they are thinner so they can fit in smaller frames, but do they do anything about the aforementioned issue?
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I'm going to calculate the refraction index with the snell's law which is n1.sin i = n2.sin r. And to calculate it do i need to use the plan parallel glass or a prism? Thank you in advance.
