Published on
06:42 GMT
How photography helped physicist Bibha Chowdhuri see the invisible in the 1930s
In 1939, a 26-year-old physicist published an article that contains what, at first, reads like instructions for an eccentric treasure hunt: place photographic plates in a refrigerator in Calcutta, in Darjeeling or in a Dak Bungalow at Sandakphu. But Bibha …
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