Which consequence results when mechanically stressed polymers exhibit birefringence?

A)Stress patterns become visually observable✓

B)Material density uniformly increases

C)Refractive index becomes isotropic always

D)Polymer crystallinity spontaneously degrades

💡 Explanation

Because tensile stress induces temporary molecular alignment in the polymer, the **photoelastic effect** causes polarized light to refract differently. Therefore, stress patterns are observable as colored fringes, rather than uniform density changes, because of directional refractive index variations.

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Which consequence results when mechanically stressed polymers exhibit birefringence?

💡 Explanation

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