A Black Hole Like a Bell: How a Light Pulse Gives Rise to Echoes ⚡ экспресс
Original: "Optical echoes of light near a black hole"
A flash of light near a black hole produces a long echo, much like the ringing of a bell.
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A flash of light near a black hole creates a lasting echo, like a bell’s ring. As it turns out, you can reproduce this on a tabletop with just a curved surface. The finding helps us understand gravitational traps and might lead to new optical devices.
🎯 If you could hover inside a black hole’s photon sphere, you’d see the back of your own head: light emitted from there would loop around the hole and return to the observer.
🎬 In Interstellar, a black hole’s gravity enables communication through time; now physicists have discovered that real light signals can also create echoes, like messages from the past.