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1·When the strain is removed, it forms a ripply surface, and the spacing of the ripples affects the colour of the laser light, which varies as the material is stretched.

当这种材料的表面产生张力时，就会产生类波纹状的表面，并且这改变还会影响激光器发出的颜色，并且会随着张力的改变而变色。