Wormholes Turn Out Brighter Than Black Holes ✦
How to tell a black hole from a wormhole? Turns out, by the shadow — no way: some wormholes have a shadow exactly like a black hole's. But as soon as matter starts falling in, the wormhole shines brighter — imagine a tunnel that's always lit.
In space, we see dark spots in glowing rings. These could be black holes — regions where gravity traps even light. But Einstein's equations also allow wormholes — tunnels through curved space. The difference is easy to grasp with an analogy: a mountain tunnel versus a dark cave. Around the entrance, superheated gas swirls. If the tunnel goes through, light enters from both sides, making the ring noticeably brighter. In a cave, the rear lights are hidden, and the glow is dimmer. Computer simulations confirm: a glowing disk around a wormhole is brighter than one of the same size around a black hole. The reason: light freely passes through the throat, and weak reddening hardly dims it. In contrast, a black hole's gravity severely stretches the light rays. This gives a simple sign: if the disk is too bright — perhaps we are looking at a wormhole. Future telescopes, using polarization of light, the pattern of its waves, could clarify its nature.
🎯 With the same shadow size, a wormhole's disk can be one and a half times brighter than a black hole's — a reliable way to tell them apart.
🎬 The movie Interstellar depicts a wormhole as a bridge to another galaxy — a fantasy inspired by the real theory of tunnels through space.