Which result follows when compressive stress aligns polymer chains?

💡 Explanation

Stress aligns polymer chains, influencing their polarizability. Birefringence then emerges because the refractive index depends on polarization direction; therefore, stress-induced birefringence is observed, rather than uniform changes in shear or hardness under isotropic thermal variation.

• Which mechanism reduces nitric oxide (NO) emissions in catalytic converters of combustion engines?
• Which outcome results when an unshielded cable carrying high-frequency signals nears a sensitive analog circuit?
• Which constraint causes reduced efficiency when superheated steam undergoes gas-to-liquid phase transition in a turbine?
• Which effect dominates dissociation energy changes when hydrogen bonds length variations in DNA arise?
• Which risk increases when supercritical fission is sustained?
• Which mechanism causes increased path loss in millimeter-wave communication?