Why Light Doesn't Experience Time
I was re-watching Interstellar the other night, and it sent me straight down a late-night research rabbit hole about the fabric of our universe. I always thought the speed of light—roughly 300,000 km/s—was just some random cosmic speed limit. Like, why that specific number? Why not faster?
But as I dug deeper into the actual physics, my mind was completely blown. I realized I had it all wrong.
Here is the wildest thing I learned during my research: For a photon, time does not even exist.
We are so used to thinking about space and time from our slow, human perspective. But the universe doesn't work the way our brains want it to. According to Einstein’s theory of relativity, the faster you move through space, the slower you move through time. It’s a literal cosmic trade-off.
To us: It takes about 8 minutes for light from the Sun to reach Earth.
To the photon: Zero time passes. From the moment it is created in the core of a star to the exact moment it hits your eye, it is an instant event. A photon doesn't age.
It gets even crazier when you realize that this isn't really about light at all. Photons don't have mass, so they naturally travel at the absolute maximum speed the universe allows. The speed of light is actually the speed of causality—the maximum "refresh rate" for reality to update itself. If things could move faster than this limit, cause and effect would shatter. You could technically see a glass break before it was dropped.
I couldn't stop thinking about the implications of this. It honestly sounds less like organic physics and more like a hard-coded limit in a video game engine to keep the servers from crashing.
I ended up writing a massive deep dive into the mechanics of this cosmic code, the concept of hypothetical faster-than-light particles (Tachyons), and how all of this beautifully ties into Simulation Theory.
If you want to break your brain a little more today, you can read my full breakdown here: The Ultimate Speed Limit
It really makes you look up at the night sky differently. If our universe has a strict "max processing speed," does that make you lean more toward Simulation Theory? Do you think there are other universes out there in the multiverse where the speed limit is completely different?
Let me know what you think below!
Stay curious, Ugu



















