PHYS 1000 Lecture Notes - Lecture 2: Electromagnetic Spectrum, Wind Wave, Electric Field
12 Feb 2018
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Document Summary
Electromagnetic radiation: transmission of energy through space without physical connection through varying electric and magnetic fields, for example light. Wave motion: transmission of energy without the physical transport of material. Example, water wave water just moves up and down, waves travels and can transmit energy. Material (things in water) that moves not the actual water (energy transferred out not the water). Frequency: number of wave crests that pass a given point per second (hz=1/s) Wavelength: distance between successive crests (length of one wave) Velocity: speed at which crests move (and what direction) Diffraction: the bending of a wave around an obstacle. Inference: the sum of two waves; may be larger or smaller than the original waves. Electromagnetic waves: oscilla ting electric and magnetic fields; changing electric field creates magnetic field, and vice versa. A magnetic, such as the earth"s sho(cid:449)(cid:374) here, exerts a force on a moving charged particle. (geographic north = south magnetic pole)
