FYI October 19, 2019

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On This Day

1900 – Max Planck discovers Planck’s law of black-body radiation.
Planck’s law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature T, when there is no net flow of matter or energy between the body and its environment.[1]

At the end of the 19th century, physicists were unable to explain why the observed spectrum of black body radiation, which by then had been accurately measured, diverged significantly at higher frequencies from that predicted by existing theories. In 1900, Max Planck heuristically derived a formula for the observed spectrum by assuming that a hypothetical electrically charged oscillator in a cavity that contained black-body radiation could only change its energy in a minimal increment, E, that was proportional to the frequency of its associated electromagnetic wave. This resolved the problem of the ultraviolet catastrophe predicted by classical physics.

It was a pioneering insight of modern physics and is of fundamental importance to quantum theory.

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Born On This Day

1942 – Andrew Vachss, American lawyer and author
Andrew Henry Vachss (born October 19, 1942) is an American crime fiction author, child protection consultant, and attorney exclusively representing children and youths.[1]

Vachss’ last name rhymes with “tax”.[2]

He grew up in Manhattan on the Lower West Side.[3]

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FYI

 
 
 
 
By Zamira Rahim, Independent: Black security guard fired after asking student not to use racial slur More than 1,000 pupils walk out of classes to protest dismissal
Mr Anderson said he was left overwhelmed by the response from pupils defending him.

“It got me a little emotional, because to be honest, you don’t get that type of response from people until you’re in a casket,” he said.
 
 
 
 
Ernie at Tedium: Historic Digital Places
 
 
 
 
Maria Popova’s Brain Pickings: Every Atom Belonging to Me as Good Belongs to You: Whitman’s Immortal Words, Illustrated in Stunning Cyanotype

Recipes

Coleen’s Recipes: ROASTED ALMONDS
 
 
My Recipe Treasures: Air Fried French Fries, Healthy Pumpkin Energy Bites