Question

What happens to indices of refraction values at Tg?

Answer 1

Refraction indices of a material is how much light bends when going through a particular material. If the bending angle is high,the material is non crystalline or amorphous. At Tg amourphous materials starts to release their entanglments and to move like a snake.. At such point refractive indices are very high because it ia hard to go through the material. As well irreapecting the weight refractive index of a material at Tg of that material is quite simillar. Not only that at Tg it takes more time to reach the equilibrium of indices of refraction