Which phenomenon defines the operation of a gravitational lens?

💡 Explanation

Spacetime curvature near massive objects creates a gravitational lens, because significant mass warps spacetime. Thus photons follow the curved path. Refraction adjusts wavelengths with a medium, rather than spacetime geometry; quantum entanglement is unrelated.

• Which mechanism diminishes signal integrity when radio waves travel through rainforest canopies?
• Which mechanism limits the Carnot engine's real-world efficiency?
• Which outcome occurs during isotope separation via gas centrifuge?
• Within a high-voltage transmission line array's shield ring, which risk increases during intense oscillating electromagnetic field activity?
• Which consequence results when the decay of potassium-40 disrupts argon dating of geological samples?
• Which effect occurs when supercooled water suddenly crystallizes?