Erik mountain beach

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Erik Östen Bergstrand (born July 3, 1904 in Uppsala , † April 28, 1987 in Linköping ) was a Swedish physicist, known for new methods of measuring the speed of light and geodetic instruments.

Bergstrand came from a family of scientists. His grandfather Carl Erik Bergstrand was an agro-chemist and geologist, his father Östen Bergstrand was an astronomy professor in Uppsala.

As a teenager, Bergstrand became interested in astronomy and radio technology. He studied physics and from 1939 worked initially as a geodesist for the state surveying office in Stockholm. He began to be interested in the problem of measuring distances precisely and developed his geodimeter , which was based on measuring the time that light traveled on the route. This led to the collaboration with Manne Siegbahn at the Nobel Institute in Stockholm.

He presented his geodimeter equipment at international exhibitions in Oslo (1948) and Brussels (1951) and his geodimeters were produced commercially by the AGA company from the 1950s. With the geodimeters, for example, you could measure a distance of 35 km on three evenings with an accuracy of 7 cm, which previously took several months with a measurement error of 35 cm. The basis for determining the length was an exact determination of the speed of light with the Kerr cell method, which he carried out from 1948.

In 1970 he received the Rossby Prize.

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personal data
SURNAME Mountain beach, Erik
ALTERNATIVE NAMES Bergstrand, Erik Östen (full name)
BRIEF DESCRIPTION Swedish physicist
DATE OF BIRTH July 3, 1904
PLACE OF BIRTH Uppsala
DATE OF DEATH April 28, 1987
Place of death Linkoping