We Almost Reached The Edge of The Universe. But Why Can't We Touch It? скачать в хорошем качестве

We Almost Reached The Edge of The Universe. But Why Can't We Touch It?

In this video we explore one of the most fascinating questions in physics: What is temperature, why does the Kelvin scale exist, and why can we never reach absolute zero? Through a simple story about three friends designing a scale to measure the height of a building, we understand the idea of reference points and absolute limits. This analogy helps explain why temperature scales like Celsius and Fahrenheit are relative, while the Kelvin scale starts from a true physical boundary of nature. The video then dives into the history and science behind temperature measurement. We look at how early thermometers worked, why Daniel Gabriel Fahrenheit created the mercury thermometer, and how Anders Celsius designed the Celsius scale that we use today. From there, we move into the deeper physics behind temperature: • Why temperature is actually related to energy of particles • How scientists discovered absolute zero (−273.15°C) • Why physics equations like PV = nRT only work correctly when temperature is measured in Kelvin • Why engine efficiency formulas like Carnot efficiency require an absolute temperature scale We also explore extreme temperatures in the universe: • The temperature of the Sun’s surface and core • Temperatures reached in supernova explosions • The Planck temperature (~1.4 × 10³² K), where our current laws of physics begin to break down On the opposite side of the scale, we discuss the coldest temperatures ever achieved in laboratories using laser cooling and Bose–Einstein condensates, and why the Third Law of Thermodynamics tells us that absolute zero can never actually be reached. By the end of the video you will understand: • Why Kelvin is the most fundamental temperature scale in physics • Why absolute zero is a true boundary of nature • How scientists study both the hottest and coldest conditions in the universe If you enjoy physics explained through simple ideas and real-world analogies, this video will help you see temperature in a completely new way. Topics covered: Temperature scales, Kelvin scale, Absolute zero, Thermodynamics, Carnot efficiency, Ideal gas law, Bose - Einstein condensate, Cosmic microwave background, Planck temperature, History of thermometers. #Physics #Thermodynamics #Kelvin #AbsoluteZero #Temperature #ScienceExplained