सौर विकिरण का कितना प्रतिशत, जिसे पृथ्वी का एल्बीडो (Albedo) कहा जाता है, सतह पर पहुँचने से पहले ही अंतरिक्ष में वापस परावर्तित हो जाता 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?