PPT-Visible Light

Sources of visible light The sun Stars Light bulbs Fireflame 21413 Lightning Fireflies Laser pointers An object is seen only when an object emits or reflects light to the eye l uminous. Astronomy: The Science of Seeing. Mastering Astronomy. Go to MasteringAstronomy.com. Register using:. Access Code:. WSSBCW-SNELL-POIND-SPINA-GIGOT-FLEES. ClassID. : NORDGREN2014. We will start using for reading and homework due next Monday.. Announcements. This week: Dark Night Observing . tonight. First “Astro-group” meeting. - Friday, 9/11; 2:30-3:30 E-109. Definitions & Terms -1. Photometric Conditions:. Differential Photometry. 14-11. Ultraviolet and visible light give rise to electronic excitations.. Spectroscopy of organic molecules is possible because the absorption of radiation is restricted to quanta having energies corresponding to specific molecular excitations:. +. -. Photon coming into atom collides with electron. Photons are energy.. Electrons Absorbing Energy. +. -. Photon coming into atom collides with electron. Photons are energy.. Electrons Absorbing Energy. Ultraviolet (UV) light falls in the range of the EM spectrum between visible light and X-rays. UV . light, which comes from the sun, is invisible to the human eye. .. It . makes black-light posters glow, and is responsible for summer tans — and sunburns. Electromagnetic Waves. Electromagnetic (EM) waves . are waves caused by oscillations occurring simultaneously in electric and magnetic fields. A . 2D. transverse. wave. They DO NOT require any medium in order to propagate. Next be sure that you have at least 4 colored pencils to work with today at your table.. Electromagnetic Waves . Spectrum Foldable. Please get your notebook and add this title to the next available page. Review worksheet. 1. . A light wave is an electromagnetic wave which has both an electric and magnetic . component associated . with it. Electromagnetic waves are often distinguished from mechanical waves. . Light. Light. Properties and Interactions. What is Light?. Light. is a form of energy emitted by the Sun..  . What is Light?. Light. is a type of energy that travels as an electromagnetic wave.. Visible light description . Generally, visible light is defined as the wavelengths that are visible to most human eyes.. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 390 to 700 nm.. Black is the absence of light.. This font is black because no light is shining here. . The light shines all around it making white. . Mixing colors. By mixing different colors you can create new colors.. . light, the sun is still the major source of light in the world. The sun is both . beneficial. and. . hazardous. to our health.. Light has some interesting properties, many of which are used in. Emitting Diode Products. www.softlights.org. https://thebrain.mcgill.ca/flash/d/d_02/d_02_cr/d_02_cr_vis/d_02_cr_vis.html. Visible Electromagnetic Radiation is Converted to Electrical Signals. Biological Expectations of Light:. When light encounters a different medium it can either be reflected, absorbed, or pass through. Most of the time it is some level of each.. A blue shirt reflects blue light (and a few others) absorbs all other colors of light and allows small intensities of all colors (white light) to pass through. .