The Incredible Science of Temperature episode 1 – Frozen Solid : Dr Helen Czerski discovers how cold has shaped our planet, and how pushing the limits of cold has unlocked new technologies, from superconductors to quantum computing.
Everything around us – from the tiniest insect on Earth to the most distant stars of the cosmos – exists somewhere on a vast scale from cold to hot. In this series, physicist Dr Helen Czerski explores the extraordinary science of temperature. She unlocks the extremes of the temperature scale, from absolute zero to searing heat of stars – and reveals how temperature works, how deep its influence on our lives is, and why it’s the hidden force that has shaped our planet and the entire universe.
In episode one, Helen ventures to the bottom of the temperature scale, revealing how cold has shaped the world around us and why frozen doesn’t mean what you might think. She meets the scientists pushing temperature to the very limits of cold, where the normal laws of physics break down and a new world of scientific possibility begins. The extraordinary behaviour of matter at temperatures close to absolute zero is driving the advance of technology, from superconductors to quantum computing.
The Incredible Science of Temperature episode 1
Temperature is a physical quantity that expresses the hotness of matter or radiation. There are three types of temperature scale: those, such as the SI scale, that are defined in terms of the average translational kinetic energy per freely moving microscopic particle, such as atom, molecule, or electron, in a body; those that rely solely on purely macroscopic properties and thermodynamic principles, such as Kelvin’s original definition; and those that are not defined by theoretical principles, but are defined by convenient empirical properties of particular materials.
Temperature is measured with a thermometer. It is calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. The most common scales are the Celsius scale (formerly called “centigrade”, with the unit °C), the Fahrenheit scale (with the unit °F), and the Kelvin scale (with the unit K), the latter being used predominantly for scientific purposes and is the primary temperature scale defined by the International System of Units (SI).
The coldest that a body can be imagined to be is when it has a temperature of absolute zero. Experimentally, it can be approached only very closely, but not actually reached, as recognized in the third law of thermodynamics. It would be impossible to extract energy as heat from a body at that temperature. A body can have a strictly physically defined thermodynamic temperature only when it is in a state of thermodynamic equilibrium. Every actual physical body in a state of thermodynamic equilibrium has a positive absolute temperature, both SI and thermodynamic.
With carefully regulated small flows of energy, a body can be held in a state that is practically steady though not of thermodynamic equilibrium, in which microscopic components of the body can be regarded as virtually having mathematically defined negative absolute thermodynamic temperature, but such a body is hotter than a body imagined to be at absolute zero temperature. The SI temperature is not defined for such components, because they are not moving freely.
Conclusion The Incredible Science of Temperature episode 1
As we reach the end of this journey into the coldest corners of our world, one thing is clear: temperature is far more than just a number on a thermometer. It’s a force that has shaped the very fabric of our universe, from the way matter behaves to the technologies that define our future. Cold is not merely the absence of heat; it is a gateway to unlocking new scientific frontiers. Just as the harshest winters sculpt mountains over eons, the extreme cold of near-absolute zero is transforming the landscape of science and technology.
Dr. Helen Czerski’s exploration of temperature’s frozen realm reminds us that even in the most frigid environments, remarkable possibilities emerge. Quantum computing and superconductors, once science fiction, are now within our grasp, all because we’ve learned to manipulate temperature in ways that push the boundaries of physics. It’s like cracking open the door to a mysterious world, where the rules we’ve always known no longer apply, and entirely new principles take over.
Yet, cold isn’t just about scientific breakthroughs. It has shaped the planet we call home. Ice ages have carved out continents, dictated the rise and fall of civilizations, and continue to influence our ecosystems today. The power of cold can be as brutal as it is beautiful, creating a delicate balance in nature that has ensured life as we know it can thrive.
As we stand on the edge of these discoveries, we realize that temperature is a fundamental force that connects us to the universe in ways we’re only beginning to understand. From the tiniest snowflake to the vast expanse of interstellar space, cold reveals both the fragility and strength of the world around us. The science of temperature, far from being a sterile concept, is a living, breathing testament to the hidden wonders of the cosmos.
In the end, the frozen extremes remind us that even in the stillness of ice, there’s a quiet hum of possibility. A world waiting to be uncovered, if only we dare to reach into the cold.
FAQ The Incredible Science of Temperature episode 1
Q: What is “The Incredible Science of Temperature” series about?
A: The series explores the vast scale of temperature, from freezing cold to scorching heat, and how it influences everything around us. Dr. Helen Czerski unlocks the mysteries of temperature, revealing its role in shaping our planet and advancing cutting-edge technologies like quantum computing and superconductors.
Q: What does Dr. Helen Czerski focus on in Episode 1: Frozen Solid?
A: In the first episode, Dr. Czerski delves into the science of cold, explaining how extreme cold has shaped the world and how scientists are using near-absolute-zero temperatures to explore new possibilities in physics, like superconductivity and quantum computing.
Q: How has cold shaped our planet according to Episode 1?
A: Cold has had a profound effect on Earth, from sculpting landscapes during ice ages to influencing ecosystems. The episode highlights how frozen environments are critical to the balance of nature and the development of human civilizations over time.
Q: What are superconductors, and how do they relate to cold temperatures?
A: Superconductors are materials that can conduct electricity with zero resistance at extremely low temperatures. In the episode, Dr. Czerski explains how the exploration of cold temperatures near absolute zero has enabled the development of these materials, which are vital for future technologies.
Q: Why can’t absolute zero be reached, and what makes it significant?
A: Absolute zero, the coldest possible temperature, cannot be physically achieved due to the third law of thermodynamics. However, approaching it reveals extraordinary behaviors in matter. As Dr. Czerski discusses, these behaviors, like superfluidity and negative temperatures, open up new scientific frontiers that redefine our understanding of physics.
