1 set up this huge pendulum somewhere in Europe to prove something for the first time.
Identify him and tell us what he proved.

Cracked by: VikraM , varuns88 , Tathagata Chatterjee , Keerthi Kiran M , shivathilak , Anu , Dibyo , sidsen , jayanth , BiGFooT , vijayaraghavan , Atul Mathew , udupendra( ;) ) , Rohan , akhi , srikar , svgreatest , vinod , Ginkgo100 , shashank , Rahul , Salil , Yash , duriel , madhur , chandru , Paresh , p vs np , sandesh , pratap and Shakeel.

VikraM, varuns88, Tathagata Chatterjee, Keerthi Kiran M, shivathilak, Anu, Dibyo, sidsen, jayanth, BiGFooT, vijayaraghavan, Atul Mathew, udupendra, Rohan, akhi, srikar, svgreatest, vinod, Ginkgo100, shashank, Rahul, Salil, Yash, duriel, madhur, chandru, Paresh, p vs np, sandesh, pratap and Shakeel