Emissions and Absorption Spectra
- Created by: rxchelhorne
- Created on: 17-02-16 19:11
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- Frequency and Wavelength are are inversely proportional
- speed of light = frequency (f) x wavelength (y)
- Emissions and Absorption Spectra
- EMISSIONS- seen as coloured lines
- Atoms are given energy through heating or by an electrical field
- Electrons become 'excited' and are promoted to a higher energy level
- When the energy source is removed, the electrons fall back to a lower energy level - energy released is lost a a photon (unit of light) with a specific frequency
- Electrons become 'excited' and are promoted to a higher energy level
- Atoms are given energy through heating or by an electrical field
- HYDROGEN SPECTRUM
- Hydrogen only has one electron, so gives the simplest spectrum
- As the frequency increases, the lines get closer together because the energy difference between the shells decreases.
- Measuring the converging frequency (difference from n=1 to n=infinity allows the ionisation to be calculated using E=hf
- EMISSIONS- seen as coloured lines
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