Please explain Increosing Wavelength But what determines the molecular fingerpri
ID: 1884839 • Letter: P
Question
Please explain
Increosing Wavelength But what determines the molecular fingerprint? Why is it that some molecules absorb strongly at a par ticular frequency of light while others do not? Let's try to answer these questions. 1 How does light interact with molecules? 1. If a molecule absorbed a light ray, where did the energy go? (be specific don't just say "it went into the moleculet What kinds of energy would the molecule have?) 2. Previously, we motivated modeling a diatomic molecule (like HCl) as a simple harmonic oscillator. What components of the diatomic molecule are represented in the simple harmonic oscillator model? Thinking about everything we've explored about barmonic oscillators- how could we represent the incoming light wave in this model? (Hint: Recall the ideas of resonance!)) 3. Let's connect parts 1) and 2); What impact would the incoming light have on the molecule using our barmonic oscillator model? What would change about the motion? Assuming that the light begins hitting at some time, ti, draw the graph of r as a function of time for the molecule as a harmonic oscillator. Be sure to show the oscillator both before and after the absorption of light. Label the axes . The graph of the Lennard-Jones potential energy, below, shows the initial energy of the molecule, E Draw what would change about the molecule after the light wave hits it. rs rExplanation / Answer
when a molecule absorbs light, it gains some energy from the light and moves to excited state. in other words, when light passes through a molecule, the energy from light transfers electron from a bonding or non-bonding orbital to any anti bonding orbitals. higher jumps needs higher energy.
also the molecule tries to store this energy through intercations with its surroundings. the energy may be transferred to other molecules using interactions such as foster coupling.
Therefore as the molecule absorbs light, the energy from light is utilised by the electron to jump to a higher energy.