PCS 181 Lecture Notes - London Academy Of Music And Dramatic Art, Electromagnetic Spectrum, Longwave
Document Summary
Experiment sitting and watching for irish fairies. Conclusion grass is green because of the energy transforming. Astronomical information is transmitted by light they emit. Light: mutually perpendicular oscillating electric and magnetic fields. Light: moves in wavelike pattern at a speed of c=3*108 m/s. No object with mass can move at speed of light. Only light goes to speed of light. Tachyon particles that moves faster than light (hasn"t been discovered) Wavelength, lamda sign: distance between peaks of wave. 1 nanometer = 1nm = m = 1*10-9 m = 10-9 m. Lamda violet = 400nm = 400*10-9m = 4*10-7m(know this) When u join a bunch of colours the light is white. Short wave length gamma rays x rays- ultraviolet (hazardous. Shortest to longest gamma to radio waves. Frequency = f (the number of occurrences over some time period) Number of wave peaks passing a given point each second.