Context:
Article in The Hindu – Science For All | What is Leidenfrost effect?
About Leidenfrost effect
A phenomenon where the bottom layer of a liquid, when added to a surface that is hotter than its boiling point, instantly vaporises and forms an insulating layer around the rest of the liquid, protecting it from boiling rapidly. The vapour layer is extremely thin but enough to keep the liquid just below its boiling point since it decreases the heat transfer from the surface to the liquid.
- An everyday depiction of the Leidenfrost effect: When cooking – when drops of water are sprinkled onto a hot pan.
When water is added to a sufficiently hot metal pan (Cooking), it scuttles around instead of immediately evaporating, even though the temperature of the pan is much higher than the boiling point of water. Since the thermal conductivity of steam is much lower than the metal pan, water in this case evaporates slower than it otherwise would.
Reference: The Hindu
Previous year question
Which one of the following is the context in which the term “qubit” is mentioned?
[UPSC Civil Services Exam – 2022 Prelims]
(a) Cloud Services
(b) Quantum Computing
(c) Visible Light Communication Technologies
(d) Wireless Communication Technologies
