Knut Ångström

Knut Ångström, born on January twelfth, eighteen fifty-seven, was a prominent Swedish physicist and inventor, renowned for his contributions to the field of physics. He was the son of the esteemed physicist Anders Jonas Ångström and pursued his studies at Uppsala University from eighteen seventy-seven to eighteen eighty-four, culminating in a licentiate degree. Following a brief period at the University of Strassburg, where he studied under August Kundt, Ångström returned to Uppsala to complete his doctoral degree.

In eighteen eighty-five, Ångström was appointed as a lecturer in physics at the newly established university college in Stockholm, which is now known as Stockholm University. After several years of dedicated teaching and research, he returned to Uppsala in eighteen ninety-one and was awarded the professorship of Physics in eighteen ninety-six, solidifying his position as a leading figure in the scientific community.

Ångström's research primarily focused on the investigation of solar radiation, terrestrial nocturnal emission, and the absorption of heat by the Earth's atmosphere. He developed several innovative instruments, including the electric compensation pyrheliometer in eighteen ninety-three, a device for capturing the infra-red spectrum in eighteen ninety-five, and the pyrgeometer around nineteen oh five. His work laid the groundwork for future studies in atmospheric science.

In nineteen hundred, laboratory assistant Herr J. Koch conducted an experiment under Ångström's guidance, which revealed no significant change in infrared radiation absorption with reduced CO2 concentration. This finding, along with earlier observations regarding water vapor absorption, led some geologists to question Svante Arrhenius's calculations on CO2 warming. Although both Ångström and Arrhenius were qualitatively correct, they were quantitatively mistaken. The experiment, while flawed by today's standards, holds historical significance in the evolution of greenhouse effect theory.

In recognition of his contributions to science, Ångström was elected a member of the Royal Swedish Academy of Sciences in eighteen ninety-three, marking a significant milestone in his illustrious career.