SCI 102 Lecture Notes - Lecture 2: Electromagnetic Spectrum, Roygbiv, Nanometre
13 Apr 2016
School
Department
Course
Professor
Document Summary
Light: mutually perpendicular oscillating electric and magnetic fields, moves in wavelike pattern at a speed of c = 3 x 108 m/s, c = speed of light. Wavelength ( ): distance between peaks of a wave. 1 nanometer = 1nm = 1 m = 1 x 10-9m = 10-9m. Red = 700nm = 700 x 10-9m = 7 x 10-7m. Violet = 400nm = 400 x 10-9m = 4 x 10-7m. Photons: bundles of energy -> light as a particle. The shorter the wavelength, the more dangerous they are (ie: ultraviolet, x- rays, gamma rays) Number of wave peaks passing a given point each second. 8 m/s f = c/ (speed of light/wavelength) fred = 3 x 10. **(m will cancel each other so put in meters rather than nanometers)** Wien equation: t = 0. 0029 m*k 0. 0029 m*k. Note: the surface temperature is ~ 5800 k. E = hf: h = planck"s constant.
