बरसात के दिनों में पानी पर तैरती तेल की पतली परतों में चमकीले रंग दिखाई देते हैं। यह परिघटना मुख्य रूप से किसके कारण होती है?

Which movement aimed to promote Khadi, a hand-spun and handwoven cloth native to India?

Who were prominent leaders associated with the initial phase of the Telangana Rebellion (1946-1951) against the Nizam's rule and feudal landlords?

What was the immediate trigger for the Revolt of 1857?