The Race for Absolute Zero: Laser Cooling

Lasers are usually associated with heat. But scientists have instead used them to reach the coldest temperature ever recorded. Could they reach absolute zero? Physics - Energy And Radioactivity - Learning Points. Absolute zero is 0^°K or -273.15^°C. Lasers have been used by scientists in an attempt to reach absolute zero. Photons from a laser cool materials by reducing the speed of atoms. Physicists today are still striving to reach the limits of cold temperatures. A Twig Context Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.