question_answer

According to Bohr's model of atom, an electron gains energy from outside when it jumps from an orbit of lower energy \[({{E}_{1}})\] to an orbit of higher energy\[({{E}_{2}})\]. Which one of the following equation is correct for the calculation of change in energy \[(\Delta \,E)\] when an electron jumps from orbital shell 1 to orbital shell 2?

A)  \[\Delta \,E={{E}_{2}}-{{E}_{1}}=hv-hu\]

B)  \[\Delta \,E=hv-hu={{E}_{2}}-{{E}_{1}}\]

C)  \[\Delta \,E={{E}_{2}}-{{E}_{1}}=hv\]

D)  All of these

E)  None of these