Sir Joseph John Thomson was English physicist who took science to new heights with his 1897 discovery of the electron- the first subatomic particle. He received the Nobel Prize for Physics in 1906 and was knighted in 1908. Thomson was born on 18th December 1856, Cheetham Hill, Manchester, England. At the age of 14, he entered Owens College (University of Manchester). In 1876, he moved on to Trinity College, Cambridge. After taking his B.A. degree in mathematics, the opportunity of doing experimental research drew him to the Cavendish Laboratory. In 1883, he received his Masters of Arts degree (with Adams Prize).

Thomson began studying cathode rays, and his research led to the discovery of the electron, and he pursued further innovations in atomic structure exploration. In 1906 he received the Nobel Prize for Physics for his researches into the electrical conductivity of gases. Besides this, he was honored with various prestigious awards such as, in 1908 he was knighted; in 1909 he was made the president of the British Association for the Advancement of Science, and in 1912 he received the Order of Merit.

Various postage stamps were issued commemorating him for his contribution; one of them is issued by Guinea Bissau Postal Department. The 350 Franc stamp depicts the portrait of JJ Thomson, along with a cathode ray tube.

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