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Mar 7 • 11 tweets • 7 min read
#MountEverest has been scaled by many mountaineers but no body knew accurately the height of the highest peak, in the past - but it was calculated accurately by one #Bengali genius #Mathematician . Read the thread to know the fascinating details
In 1831, surveyor-general of India George #Everest was looking for a mathematician who had specialised in spherical #trigonometry to join the #GreatTrigonometricSurvey
#RadhanathSikdar, a student and a master in spherical trigonometry from Kolkata’s Hindu College (now #PresidencyUniversity) was handpicked for the #survey department of the #British government in the 1830s
Sikdar, at 19, was appointed in that post, as a “computor”. His salary was Rs 30 per month.
livehistoryindia.com/story/people/t…
As part of the team set up for the Great Trigonometric Survey started by George Everest, then surveyor general of India, Sikdar travelled across India to conduct #geodetic surveys.
madrascourier.com/biography/radh…
In 1852, Everest’s successor Andrew Scott Waugh asked Sikdar & his team to start measuring the the height of mountains
Sikdar used data from six observations and calculated the height of Peak XV and stated that it was taller than Kanchenjungha, which was till then considered the highest mountain peak in the world.
Peak XV came to be named after the previous surveyor-general, Everest with a calculated elevation of exactly 29,000 feet or 8,839.2 metres (today corrected to 8,848 metres).
Sikdar, a follower of #Derozio, was a brilliant student of Hindu College. He was equally famous for social service & played a leading role in passing of the Widow Remarriage Act, prohibition of child marriage & polygamy.
In 2004 GOI released a stamp honouring his contribution on the occasion of the 200th anniversary of the establishment of the Great Trigonometric Survey in Chennai, India.
#Scroll has made a fabulous video explaining the History in brief as well as the Methodology used by Sikdar who computed near accurately the height of Mount Everest which is sheer inspiring & a brilliant tribute to the genius Mathematician .

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More from @satyanewshi

সত্যাণ্বেষী Profile picture
Feb 22
From the Past - The man who warned us.~In 1999 Former PM Dr. #ManmohanSingh gave an interview to BBC hosted by Karan Thapar. In that Interview he warned against assuming that 🇮🇳was destined to flourish & prosper, if economy was mismanaged & society divided on a sectarian basis Image
He stated the short comings of Indian politics "Many politicians practice a very divisive politics for narrow sectarian reasons. It may be good politics for the moment but it can be a sort of disaster for our country.”
He also stated the very characteristics of an 🇮🇳Politician "Politicians in our country do not adjust their thinking to the changing needs of our time. Our politicians feel whatever they learn in their childhood is adequate stock for them to pronounce on everything in the world.
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সত্যাণ্বেষী Profile picture
Feb 18
INA trials & the Final Mutiny- The forgotten saga which led to India's Independence .
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After the end of WW II, the British govt convened a series of trials against former officers of the Indian National Army (INA), who had fought alongside the Japanese forces in the pursuit of national liberation. The trials began on 5 Nov 1945 inside Delhi’s Red Fort.
The British opted to try Major General Shah Nawaz, Lieutenant Colonel P.K. Sahgal and Lieutenant Colonel G.S. Dhillon – respectively, a Muslim, a Sikh and a Hindu.
In their determination to demonstrate their even-handedness by selecting from each religions.
Read 21 tweets
সত্যাণ্বেষী Profile picture
Feb 16
#Kolkata the city of #Cyclotrons - where Indian scientist led by the legendary #MeghnadSaha DARED TO DREAM BIG
A cyclotron is a particle accelerator. It is an electrically powered machine which produces a beam of charged particles that can be used for medical, industrial and research processes.
As the name suggests, a cyclotron accelerates charged particles in a spiral path, which allows for a much longer acceleration path than a straight line accelerator.
Read 13 tweets
সত্যাণ্বেষী Profile picture
Jan 15
India's Alarming Child Mortality rate & worrisome statistics on Children's Health- A thread +

42 /1000 children die before age of 5

#UttarPradesh, #Bihar (56.4 deaths for every 1,000 live births) & Chhattisgarh (50.4/1,000) have the highest under-five mortality rate.
The 10 Indian states with the highest child mortality rates compare with Afghanistan, & countries in eastern & southern Africa – where some countries have Africa’s most protracted conflicts, according to the World Bank.
As many as 16 /34 Indian states and Union Territories in India have child mortality rates comparable with countries in sub-Saharan Africa.
Read 7 tweets
সত্যাণ্বেষী Profile picture
Dec 17, 2021
Often We Bengalis hear ,Bengal lacks entrepreneurs & Bengalis are "not good in Business".Its time to break the Myth -hence starting a thread on Inspiring Bengali Entrepreneurs - which shall be updated periodically hence forth
Heard of the name Supriya Roy ? - She is the MD & founder of Sugar & Spice bakery chain which has 125 outlets in West Bengal, & they make as many as 51 products including cakes, pastries, bread, sandwiches, burgers, pizzas, hot dogs, and croissants.theweekendleader.com/Success/2365/m…
The Swedish Hotel chain 'Elite' is owned by Barun Chakraborty, a Calcutta University graduate getbengal.com/details/meet-b…
Read 47 tweets
সত্যাণ্বেষী Profile picture
Dec 16, 2021
"Dhaka is now a free capital of a free country"Said The then PM of 🇮🇳Indira Gandhi on 16 Dec,1971 after surrender of 🇵🇰forces in 🇧🇩,but the greatest Military surrender was achieved through sharp mind games. Read this thread to know the fascinating details #VijayDiwas
The Military operation in the then East Pakistan was spear headed by Field Marshall ( CoAS ) Sam Maneckshaw - A Parsi , Gen. J.F.R Jacob ( CoS Eastern Command ) - A Jew & Gen. JJ Singh Arora ( GoC - Eastern command ) - A sikh #1971IndoPakWar #1971WarHeroes #VijayDiwas
But it was J .F.R Jacob the Jewish General from Calcutta who made Pakistan Surrender in Bangladesh .Jack Farj Rafael Jacob grew up in a conservative Baghdadi Jews of Calcutta.
scroll.in/article/676912…
Read 15 tweets

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