chemistry / Analysis / free
Spectroscopy
Read the fingerprints molecules leave in light.
Follow the cause1 / 3
Radiation meets a molecule. A photon interacts when its energy matches an allowed molecular transition.
molecular fingerprintsIR · 4 diagnostic peaks
Focus the idea
methodIR
diagnostic peaks4
largest signal70%
evidencestructure
IR absorption is strongest when a bond vibration changes the molecule's dipole. Peak position suggests the bond type; intensity is a separate clue.
The plotted peaks are teaching signals, not an instrument trace. Real spectra depend on calibration, solvent, coupling, line width, concentration, and instrument resolution.
04 / PRACTICE
0 / 3 checkedMake the chemistry yours.
Answer from the model, then use the explanation to connect the particle picture to the chemical rule.
CHECK 1 / 3