# How to interpret TD-DFT results for finding λmax and amplitude

I am trying to understand how to interpret the TDDFT results ( I know there is another post for this but it does not answer my question ). Here is part of the result from GAMESS:

I have two related questions:

1-How did it calculate this 1.41 from the amplitude of this state ?
2-Does it have anything to do with λmax ?

• Which reaction are you talking about? The question is vague. Energy can be transferred through collisions even in liquids. And such collisions can lead to emission of electrons. The Helium-Neon laser operates like this en.wikipedia.org/wiki/Helium%E2%80%93neon_laser – CoffeeIsLife May 9 '15 at 1:40
• that should just be the transitions of the orbitals and your $\lambda_\mathrm{max}$ should be somewhere around $9.3~\mathrm{eV}$ judging from the spectrum. Note that the state you have selected has 0.000 oscillator strength. – Martin - マーチン May 12 '15 at 8:30
• @Martin-マーチン this is the output for Acetone and related to my other question about Acetone behavior. I am confused what is going wrong and how this 1.41 is calculated – Aug May 12 '15 at 13:35
• These are terrible tags! Reaction mechanism? Heat? Transition state theory? They don't make any sense. – Greg May 15 '15 at 11:06