AST-1A Lecture Notes - Lecture 8: Frequency, Electric Field, Radiography
Document Summary
Radiation waves that radiate outward from a source no need for any physical connection between 2 points. Electromagnetic refers to energy travelling in the forms of oscillating electric and magnetic fields that is given off by electrons inside atoms. Wave a disturbance in which energy is transferred from place to place without physical movement of material from one place to another. Maxwell"s theory of electromagnetism deals with the electrical charges inside and outside of the atom. When charges are in motion we measure another force called magnetism. Stationary electric charges produce electric fields, and moving electric charges also produce magnetic fields. All electromagnetic waves move at the same speed in empty space. The horizontal length covered by one cycle is called the wavelength. Wave period the number of seconds needed for the wave to repeat itself at some point in space. The maximum departure of the wave from the undisturbed state amplitude.
