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Re:Runway melts at London Luton airport as temperatures in U... by ridgeguy on Tuesday July 19, 2022 @04:18PM (#32157379)
Not necessarily true. It depends on the object's optical properties.

I well remember working on my parents' car in Phoenix summers. The chromed wrenches on our driveway surface got to instant-blister temperatures. Tools with black surfaces were uncomfortable to pick up, but were usable.

The chromed tools had a lower absorption of sunlight than the black tools, but their IR radiation coefficient was even lower. So equilibrium temperature (at which radiated energy = incident energy) was much higher for the chromed tools.

Re:Runway melts at London Luton airport as temperatures in U... by WalterBright on Tuesday July 19, 2022 @04:49PM (#32157760)
I was always careful to put my tools in the shade under the car :-)

(Used to live in Glendale.)