LIGO 怎么测出比原子核还小的晃动？
How does LIGO measure a wobble smaller than an atom's nucleus?
LIGO 用两条 4 公里长的垂直真空臂，激光在两端来回比长度。引力波经过时两臂长度差改变约千分之一质子直径，干涉条纹随之移动。
LIGO uses two 4-km vacuum arms and compares lengths with laser light. A passing wave changes their difference by about a thousandth of a proton's width, shifting the interference pattern.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
LIGO 科学合作组与 Virgo，《双黑洞并合引力波的观测》，Physical Review Letters 116, 061102 (2016)
LIGO Scientific Collaboration & Virgo, 'Observation of Gravitational Waves from a Binary Black Hole Merger', Physical Review Letters 116, 061102 (2016)
独立核验依据 · Independent verification: 核验依据 1 EUROPEPMC 标识 26918975：Observation of Gravitational Waves
#LIGO #干涉 #探测精度
我们怎么“听”到黑洞碰撞？
How do we 'hear' black holes collide?
两颗黑洞合并会抖出引力波，探测器用激光测出比质子还小的长度变化，再转成声音让我们“听”到。
Merging black holes shake out gravitational waves; detectors catch length changes smaller than a proton and turn them into sound.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
LIGO 科学合作组与 Virgo，《双黑洞并合引力波的观测》，Physical Review Letters 116, 061102 (2016)
LIGO Scientific Collaboration & Virgo, 'Observation of Gravitational Waves from a Binary Black Hole Merger', Physical Review Letters 116, 061102 (2016)
独立核验依据 · Independent verification: 核验依据 1 EUROPEPMC 标识 26918975：Observation of Gravitational Waves
#引力波 #黑洞 #探测
引力波到底是什么“声音”？
What kind of 'sound' are gravitational waves?
引力波不是声音，而是时空像水面一样被黑洞碰撞、超新星等大事件“晃”出来的波纹，要用巨大的探测器才能捕捉到。
Gravitational waves are not sound but ripples in spacetime stirred up when black holes collide or stars explode, caught only by giant detectors.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
LIGO 科学合作组与 Virgo，《双黑洞并合引力波的观测》，Physical Review Letters 116, 061102 (2016)
LIGO Scientific Collaboration & Virgo, 'Observation of Gravitational Waves from a Binary Black Hole Merger', Physical Review Letters 116, 061102 (2016)
独立核验依据 · Independent verification: 核验依据 1 EUROPEPMC 标识 26918975：Observation of Gravitational Waves
#引力波 #时空 #探测