Majumdar was born on 1 March 1904 in Patgram, a village in Dacca district of the Bengal Presidency, now in Bangladesh.
His father, Mahesh Chandra Majumdar worked in a tea estate in Jalpaiguri district of West Bengal.
[3] During this period, he was a frequent visitor to Cambridge University, where his friend and collaborator Daulat Singh Kothari was working for his Ph.D.
According to one source, Majumdar went to Cambridge, "arriving — it is said — on the doorstep of Lord Rutherford's home on a Sunday afternoon".
[1] Overall, Majumdar, through his life and work, reinforced the idea that it was possible to do high-quality physics research in a university, as evidenced by his turning down the TIFR offer.
[citation needed] Majumdar also started a tradition of organising summer schools on topics of current interest.