Two electrons are moving in orbits of two hydrogen-like atoms with speeds 3 × 105 m/s and 2.5 × 105 m/s respectively. If the radii of these orbits are nearly the same, then the possible order of their principal energy states (n1 and n2) are _____ respectively.

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?