At their core, the laws of nature are simple; that’s why they never break down. Join us on a journey of discovery as we reveal nature’s deepest secrets. No jargon, no math — just the beauty of physics made clear.

Do two photons approach each other at twice the speed of light, 2 c ? This popular question highlights the distinction between relative and closing speeds in Newtonian physics and their interpretation within the context of special relativity. In everyday Newtonian usage, when we mention that two cars are approaching each other at, say, 100 km/h, we typically refer to the closing speed, determined as the sum of the speeds of both cars. However, the relative speed is also calc