Transition Energy from T1g to T2g is the transition of energy from T1g to T2g. And is denoted by ET1gtoT2gP. Transition Energy from T1g to T2g is usually measured using the Diopter for Wave Number. Note that the value of Transition Energy from T1g to T2g is always negative. Typically, the value of Transition Energy from T1g to T2g lies in the range from 0 to 100000.