Let’s dive into the universe’s ultimate speed limit: the speed of light. It’s a concept so fundamental that it underpins much of modern physics, yet so mind-bogglingly fast that, as you say, human intuition struggles to truly grasp it. We call it ‘c’, and its value in a vacuum is precisely 299,792,458 meters per second. That’s not just an estimate; since 1983, the meter has been precisely defined as the distance that light travels in a vacuum in exactly 1/299,792,458 of a second. So, light’s speed isn’t just something we measure; it’s a foundational pillar of our measurement system.

Continue reading → ‘c’: More Than Just Fast as We Unpack the Universe’s Master Constant