WIMPs are proposed candidates for which cosmic component?

• A. Dark energy
• B. Ordinary matter
• C. Antimatter
• D. Dark matter

Answer: (D)

WIMPs are hypothetical particles called Weakly Interacting Massive Particles that scientists proposed as the constituents of dark matter. Dark matter is the unseen mass that exerts gravity on galaxies and the cosmos but does not emit light. The idea is that WIMPs would have mass while interacting only very weakly with normal matter—through gravity and the weak nuclear force—so they pass through ordinary matter largely undetected. This aligns with why we infer dark matter's presence from gravitational effects without seeing it directly. They are not dark energy, which drives the universe’s accelerated expansion; they are not ordinary matter made of protons and neutrons, which interacts electromagnetically; and they are not antimatter, whose annihilation with matter would produce easily observable signals. Thus, WIMPs are proposed candidates for dark matter.