Toha

Human rights activist, Vocal against every kind of oppression, Researcher.

[Islamic Scientific Heritage @IslamicSH_]

✨In the 11th century, the famous Muslim polymath Al-Biruni figured out the Earth's radius using nothing more than a mountain and a bit of trigonometry. 📐

The insight was brilliant:

Stand on a mountain, and the horizon dips below the horizontal. That dip isn't an optical illusion; it's a geometric signal. It creates a right triangle where the mountain's height (h) and the Earth's radius (R) are the only variables.

Measuring the mountain's height without climbing down:

He used a simple trigonometric trick: from two points on the plain, he measured the angle to the peak. Knowing the distance between those points, he calculated the mountain's height with a formula surveyors still use today:

H = D / (cot A1 – cot A2)

From the peak, he measured the dip angle to the horizon: α = 34′ (just over half a degree):

R = h * cos(α) / (1 - cos(α))

How did he compute the cosine of such a tiny angle?

Without modern calculators, he used a sophisticated technique: he started with the known value of cos(60°) and used the half-angle formula to work his way down to the required value for his 34′ angle.

He calculated the Earth's radius as 6,340 km. The modern value is 6,371 km.

An error of less than 1%. In 1030 CE.

[Izabil @Kahbah333]

@erling @grok
https://t.co/P4weLQRVr7

[khalid yousef @khalidsyossef]

Islam and Modernity: Key Issues and Debates
eds. Muhammad Khalid Masud et al. Edinburgh University Pr, 2009
PDF 🎯
https://t.co/PLwPQHdgmz

[Toha @toha_bd]

extra-judicial killing must go from everywhere in the world!!

https://t.co/ocQGX1hKEQ

[Mia @toomuchliving]

tonight’s full moon from my telescope 🔭

[Toha @toha_bd]

India’s government and farmers fail to find a common ground over new laws that could affect grain prices.

[Banglanews24.com @banglanews24com]

রোহিঙ্গা সংকট সমাধানে জাতিসং��� প্রস্তাবে ভোট দেয়নি ভারত, বিপক্ষে চীন https://t.co/vnylEzeJ7h

[Toha @toha_bd]

Three days after the abduction in Sitakunda, the packed Dead body of #Jubodol leader was recovered from Sea beach in Sayedpur, Sitakund.

https://t.co/IGnryakYYK

[Gistaer @Gista3r]

From Iran to India: The journey and evolution of biriyani - BBC News https://t.co/BjKAfmYMxZ #travel #Biriyani #Dhakatimes #Dhaka #Bangladesh #sylhet #foodblogger #foodtravelchat #foodie #foodies #Rice #Iran #India #Hyderabad #HyderabadMetro #delicious #tasty #Tehran #NewDelhi

[Toha @toha_bd]

U can't immure truth forever... https://t.co/pYnULqRMpE

[Poppy McPherson @poppymcp]

No words to describe the joy of speaking to @AungNaingSoeAns, released today from prison with his @trtworld colleagues after more than 2 months. He is relieved, grateful to all his supporters and described it as an experience. Now waiting for the same for Reuters colleagues.

[Abdul Hamid Faruki @TjpAbdul]

We heard "#NeverAgain" after the Holocaust, it was said after Srebrenica, it was said after the Rwanda genocide, but it's happening right now, again. In #Myanmar. The #Rohingya #Muslims are facing genocide by the Myanmar army, and the word watches on. Again.

#HumanRights

[Toha @toha_bd]

Discriminatory behavior based on religion.... https://t.co/qMw9jmQS6Z

[The Daily Star @dailystarnews]

#Myanmar to take back 450 #Hindu refugees from #Bangladesh at a refugee camp set up in #Rakhine as the first step of repatriation process https://t.co/jbm5ueKdZ0

[The Daily Star @dailystarnews]

#BREAKING: A case filed against Farhad Mazhar and his wife for "staging a drama in the name of abduction” #Bangladesh https://t.co/vUXa9vzKI2

[Mark Kersten || @markkersten.bsky.social @MarkKersten]

Liberia: Agnes Reeves, Charles Taylor Ex-Wife Denied Bail in UK https://t.co/zs26uOzVM7 #Liberia

[Toha @toha_bd]

@MichaelPolakLaw @MdShahriarAlam @albd1971 @tariqahmadbt @AlistairBurtUK @RoryStewartUK @UKParliament @FCOHumanRights @MarkFieldUK @BorisJohnson @MichaelPolakLaw could't understand how #BAL govt. supporters psyche and law of #Bangladesh works.When U aren't with us, we hav potential right 2 do whether killing, abduction or anything we want 2 do with u.It's their mercy we people live. "Don't put yourself in disrepute" Dude

[Basherkella - বাঁশেরকেল্লা @basherkella]

According to the human rights org Odhikar, there were 408 disappearances recorded in Bangladesh between January 2009 and November 2017.
Most of them are opposition BNP, Jamaat & Shibir leaders and activists.
#BringBackOurBrothers #EnforcedDisappearances

[meenakshi ganguly @meeganguly]

Bangladesh army continues to be used for civilian law enforcement leading to allegations of serious human rights violations. Military intelligence, DGFI, accused in alleged disappearances. RAB a is force that deploys military into policing. https://t.co/KELvHKCwgp

[Samiya Hossain Jotey @Jot3y]

I liked a @YouTube video https://t.co/BTD7TgfCeG Bangladesh Air Force MiG-29 Multi-Role Combat Aircraft