Chemistry › Section F · Electronic structure and periodic properties › Topic F.1
Electromagnetic energy
Almost everything we know about the insides of atoms was learned by studying the light they absorb and give off. To read that evidence you need two pictures of light at once: a wave with a wavelength and frequency, and a stream of particles called photons, each carrying a fixed packet of energy.
In this topic
- Light as a message from atoms
- Describing a wave
- The electromagnetic spectrum
- Interference and standing waves
- Planck's quanta
- Photons and the photoelectric effect
- Energy per photon and per mole
- Worked example: frequency and energy of laser light
- Worked example: a photoelectric cell
- Continuous and line spectra
- Common mistakes to avoid
- Key takeaways
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