AS101 Chapter Notes - Chapter 4: Adaptive Optics, Chromatic Aberration, Radiography
Document Summary
Electromagnetic radiation changing electric and magnetic fields that travel through space and transfer energy from one place to another; ex. Wavelength ( ) the distance between successive peaks or troughs of a wave, usually represented by a lowercase greek lambda. Nanometre (nm) a unit of distance equalling one-billionth of a metre, commonly used to measure the wavelength of light. Angstrom ( ) a unit of distance commonly used to measure the wavelength of light. Infrared (ir) the portion of the electromagnetic spectrum with wavelengths longer than red light, ranging from 700nm to about 1mm, between visible light and radio waves. Ultraviolet (uv) the portion of the electromagnetic spectrum with wavelengths shorter than violet light, between visible light and x-rays. X-rays electromagnetic waves with wavelengths shorter than ultraviolet light. Photon a quantum of electromagnetic energy that carries an amount of energy that increases proportionally with its frequency but decreases proportionally with its wavelength.
