What device is essential for studying superfluidity in helium-3?
Telescope
Microscope
Spectrometer
Cryostat
Answer
Cryostat is essential for studying superfluidity in helium-3 because it provides an environment with extremely low temperatures, typically below 2 millikelvins. Superfluidity, a state of matter where a fluid exhibits zero viscosity, occurs in helium-3 at these ultra-low temperatures. The cryostat creates and maintains these low temperatures by using liquid helium-4 as a coolant and employing techniques such as evaporative cooling and dilution refrigeration.
Unlocking the Cold: The David Lee Nobel Quest
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