Which observation confirms spacetime curvature near black holes?

💡 Explanation

Gravitational lensing demonstrates spacetime curvature because the black hole's mass warps spacetime, bending light paths like a lens and intensifying images; therefore lensing is observed rather than intensity changes or horizon alterations with other mechanisms.

• Which mechanism causes reduced light emission when adding impurities within an LED's band gap?
• Which risk increases when an implantable cardioverter-defibrillator's (ICD) capacitor degrades?
• Which effect occurs in a molecule when anti-bonding molecular orbitals are preferentially populated by electrons?
• Which consequence results when applying strong static electric field to crystal containing mobile ionic defects?
• Which mechanism enables lossless power transmission in superconducting transmission lines?
• Which mechanism curves light traveling from distant quasars?