Black Holes Trivia Questions
- ❓ 96+ questions
- 🗂️ Space
- 🎚️ Easy to expert
- ✨ Free to play
Regions of spacetime with extreme gravity. Play Black Holes trivia solo to sharpen your knowledge, or challenge a friend head-to-head in Trivia Tango — every question comes with an explanation so you learn as you play. Questions span every level, from easy warm-ups to expert-level stumpers, so there's a real challenge here however much you already know.
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Sample Black Holes Quiz Questions
A mix of easy, medium and hard — questions run from warm-up to expert, so there's a real challenge at every level. Think you know the answers? Play to find out.
This boundary marks the point of no return around a black hole, beyond which nothing—not even light—can escape.
Difficulty: Easy- Event horizon
- Photon sphere
- Schwarzschild radius
- Accretion disk
This equation relates a black hole's entropy to its event horizon surface area, suggesting black holes have enormous entropy: S = A/4.
Difficulty: Medium- Hawking equation
- Bekenstein-Hawking formula
- Penrose formula
- Wheeler-DeWitt equation
This version of the laws of black hole mechanics relates changes in mass, area, angular momentum, and charge through dM = (kappa/8*pi)*dA + Omega*dJ + Phi*dQ.
Difficulty: Hard- Zeroth law
- First law
- Second law
- Third law
This famous physicist's equations from 1915 first predicted the existence of black holes as a consequence of curved spacetime.
Difficulty: Easy- Isaac Newton
- Albert Einstein
- Stephen Hawking
- Niels Bohr
This effect causes spacetime to be dragged around a rotating massive object, verified by the Gravity Probe B satellite orbiting Earth.
Difficulty: Medium- Frame dragging
- Geodetic effect
- Shapiro delay
- Lense-Thirring effect
This surface, lying just outside the event horizon, has physical properties determined by the infalling observer's acceleration.
Difficulty: Hard- Stretched horizon
- Apparent horizon
- Dynamical horizon
- Rindler horizon
This is the term for the swirling disk of gas and matter that spirals around a black hole before falling in.
Difficulty: Easy- Corona
- Event horizon
- Accretion disk
- Singularity
This hypothesis suggests that singularities are always hidden behind event horizons and cannot be observed from outside.
Difficulty: Medium- Holographic principle
- No-hair theorem
- Black hole complementarity
- Cosmic censorship conjecture
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