(a) False; Historians rely on coins, inscriptions, architecture and textual records for information for the study of period from 700 to 1750.
(b) True
(c) True
(d) False; Sultan Ghiyasuddin Balban (1266-1287) ruled...
a) The gas emits 6 wavelengths, let it be in nth excited state.
=> n(n-1)/2=6=>n=4
So, The gas is in 4th excited state.
b) Total no.of wavelengths in the transition is 6. We have ...
Number of votes secured by successful candidates = 5,77,500
Number of votes secured by his nearest rival = 3,48,700
Margin between them =577500-348700= 2,28,800
Therefore, the successful candidate won by a margin of...