研究目的
Investigating the effects of mechanical strain and molecular forces on the structural character of unannealed glass and its interaction with polarised light.
研究成果
Mechanical strain and molecular forces can impart a structural character to unannealed glass analogous to that of a crystal, affecting its interaction with polarised light and producing chromatic effects. These effects can be used to measure mechanical pressures with high accuracy.
研究不足
The experiments are limited by the intensity of mechanical forces that can be exerted and the risk of fracture when applying pressure. The effects of molecular forces due to heat and cooling are also considered, but the focus is on mechanical means.
1：Experimental Design and Method Selection:
The experiment involves straining a rectangular bar of ordinary glass and observing the effects under polarised light. A frame with a screw is used to apply pressure at particular points.
2：Sample Selection and Data Sources:
A rectangular bar of ordinary glass and a thick square plate of glass are used as samples.
3：List of Experimental Equipment and Materials:
Polariser, analyser, rectangular bar of ordinary glass, frame with a screw, thick square plate of glass, vice.
4：Experimental Procedures and Operational Workflow:
The glass is strained or squeezed, and the effects are observed under polarised light. The pressure is increased or diminished to observe changes in chromatic effects.
5：Data Analysis Methods:
Visual observation of chromatic effects and dark bands under polarised light.
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