Chemistry A-Level
wavenumber and transmittance axes
What wavenumber and transmittance axes means in Chemistry A-Level, as defined for OCR.
Definition of wavenumber and transmittance axes
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Reference: OCR
An infrared spectrum plots percentage transmittance against wavenumber in cm⁻¹, with wavenumbers read from the horizontal axis.
Topics that use wavenumber and transmittance axes
- Analytical techniques (OCR A-Level)
Related terms
- Absorption and re-emission of infrared radiation
- Absorption of infrared radiation
- Absorption of infrared radiation by bond vibrations
- Bond stretching and bending
- Broad peak shape caused by hydrogen bonding
- Change in dipole moment
- Changes to energy usage
- characteristic absorption bands
Using wavenumber and transmittance axes in the exam
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