Biology 1002B Lecture Notes - Lecture 2: Electromagnetic Spectrum, Photon, Conjugated System
27 Jan 2020
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Class 2 outcomes (on an exam you should be able to identify ) From independent preparation assignments: characteristics of the electromagnetic spectrum. The range of wavelengths or frequencies of electromagnetic radiation extending from gamma rays to the longest radio waves and including visible light: definition of light. It is most commonly defined as the portion of the electromagnetic spectrum that humans can detect with their eyes. It spans from 400-700nm: particle-wave duality: behaves as a particle (photon) and a wave. It is a stream of photons: relationship between wavelength and energy content of a photon. The longer the wavelength, the lower the energy of the photons it contains. The shorter the wavelength, the higher the energy of the photons it contains: definition of absorption of light. Absorption occurs when the energy of the photon is transferred to an electron, moving it from its ground state to a higher energy level that is an excited state.
