OPTI 200 Lecture Notes - Lecture 1: Electromagnetic Spectrum
30 Aug 2018
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Document Summary
That portion of the electromagnetic spectrum visible to the human eye. [explains how mirrors work] light can bend, {refraction}: [explains how lenses work] the physics of light light travels as waves: Waves have motions which propagate energy or something nonmaterial. A wave is a propagating disturbance to things such as material things (rope, water, flag on a windy day (cid:1688)continuous medium(cid:1689)) of some resting state or nonmaterial like the em field (em field exists everywhere) Em waves are propagating loops of electric magnetic field lines which are invisible, can exist in a vacuum, and waves can be set up in them. To generate a wave you must move (oscillate) a charge. Em waves are disturbances in the em field, which are time-varying oscillations in the electric and magnetic field lines. Oscillating charges (electrons) produce an em wave that propagates (found in any material that gives off light)
