Monika Barala
Optical properties are a set of physical properties of a body, which include: light transmission, visual transparency, refractive index, turbidity and shine.
1. the refractive index of water at 20 0C is 1.33, and ice is 1.31.
2. water and ice absorb infrared radiation differently and close the infrared atmospheric window, thereby contributing to the greenhouse effect.
3. ice has a shine greater than water
Depends on what you mean by crystallinity and optical properties.
If by optical properties we mean image an optical polarization microscope and by crystallinity - defectiveness of the structure and density of dislocations (broadening of the peaks XRD), then in thin sections of the material with crossed polarizers one can observe the so-called undulose extinction and domain structure. In addition, many fluid or mineral inclusions may be visible. (This is especially clearly seen in the example of quartz.)
If by crystallinity we mean in an the ratio of amorphous and crystalline phases, then in the case of large objects, more than 2-5 microns, we can see an optical polarization microscope isotropic (amorphous areas) and anisotropic (crystalline areas) parts. This can be seen on the surface of devitrified glass. In addition, the refractive index of the material will change.
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