Giants in History: Bibha Chowdhuri

The physicist who studied cosmic rays 

Bibha Chowdhuri ( 1913 - 02 June 1991)


Bibha Chowdhuri (1913 – 2 June 1991) was an Indian physicist who researched on particle physics and cosmic rays. In 1936, she was the only female to complete a M.Sc. degree at the University of Calcutta. After graduating, she joined the Bose Institute and together with Debendra Mohan Bose, discovered the boson subatomic particle. During her Ph.D. studies at the University of Manchester, Chowdhuri worked on cosmic rays and investigated air showers, which are cascades of ionized particles and electromagnetic radiation produced when a cosmic ray enters the atmosphere. She discovered that when particle density of an air shower increases, so does the density of penetrating events. A life-long researcher, Chowdhuri published her last paper a year before her death. For her contributions, the International Astronomical Union (IAU) named a star in the Sextans constellation “Bibha” in her honour.  

University of Manchester
University of Calcutta