Structure of Atoms and Nuclei — Physics STD 12 Science — Question

Bohr’s postulates
(1) Electrons revolve in only those orbits for which the angular momentum is an integral multiple of \(\frac{h}{2 \pi}\).
\(l=m \vee r=\frac{n h}{2 \pi}\)

(2) When electrons jump from higher orbit to lower orbit they radiate energy in the form of \(h \vee\)
where \(h\) is the Planck's constant and \(v\) is frequency \(E_2-E_1= hv\)
Energy of ground state
\(E=-13.6 eV\)