General Relativity2026-05-291 minarXiv:2606.00166expressHow a Black Hole Amplifies Gravitational WavesIn the usual picture, a black hole is a featureless pit in spacetime. But if a shell of matter vibrates around it, the gap between the edge of the abyss and this shell becomes a resonant cavity.Han-Wen Hu·Chen Lan·Zong-Kuan Guoquadrupole radiation formulaFirst law of black hole mechanicsAlbert EinsteinBarry BarishKip Thorneblack holeblack hole mergergravitational wavesgravitational singularitygravitational potential👍👎☆SimplePopularAdvanced