the.com/white hot

The temperature where metal forgets its color and starts impersonating the sun.

means So intensely hot that a material glows with a near-white light — or, figuratively, at the peak of intensity, anger, or excitement.

from From the way heated metal climbs through a visible color ladder: as it gets hotter it glows dull red, then orange, then yellow, and finally a glaring white as the radiation it emits spreads across all visible wavelengths at once. Smiths and metalworkers read these colors for centuries to judge temperature, and 'white hot' marked the fiercest stage. The figurative sense — 'white-hot rage,' a 'white-hot streak' — borrows that same idea of heat pushed to its blinding limit.

Hotter than red
White heat tops 1300°C, well past glowing red
Color ladder
Metal climbs from red to orange to blinding white
Blackbody trick
All colors emit at once, blending into white
Smith's eye
Old blacksmiths judged heat by hue alone
Star math
White stars run hotter than our yellow sun
for instance

white hot chili peppers — american rock band formed in los angeles in 1983, known for funk-rock fusion

white hot poker — garden plant (kniphofia) with tubular flowers reaching up to 1.5 meters tall

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