In astronomy and atomic physics, doubly ionized oxygen is the ion O2+ (O III in spectroscopic notation). Its emission forbidden lines in the visible spectrum fall primarily at the wavelength 500.7 nm, and secondarily at 495.9 nm. Before spectra of oxygen ions became known, these lines once led to a spurious identification of the substance as a new chemical element. Concentrated levels of O III are found in diffuse and planetary nebulae. Consequently, narrow band-pass filters that isolate the 500.7 nm and 495.9 nm wavelengths of light, that correspond to green-turquoise-cyan spectral colors, are useful in observing these objects, causing them to appear at higher contrast against the filtered and consequently blacker background of space (and possibly light-polluted terrestrial atmosphere) where the frequencies of [O III] are much less pronounced. These emission lines were first discovered in the spectra of planetary nebulae in the 1860s. At that time, they were thought to be due to a new element which was named nebulium. In 1927, Ira Sprague Bowen published the current explanation identifying their source as doubly ionized oxygen. Other transitions include the forbidden 88.4 μm and 51.8 μm transitions in the far infrared region. Permitted lines of O III lie in the middle ultraviolet band and are hence inaccessible to terrestrial astronomy. (Wikipedia).
Liquid oxygen and Highly Flammable Liquids!
Liquid oxygen and Highly Flammable Organic Liquids is a cool combo! ========== Reaction timing: 0:46 Liquid oxygen + Carbon disulfide 1:20 Liquid oxygen + Nitromethane 2:27 Liquid oxygen + Acetonitrile 3:11 Liquid oxygen + Thiophene 3:40 Liquid oxygen + Hexaethyldisilane 4:28 Liquid oxygen
From playlist Oxidizers!
How Is Oxygen Used | Properties of Matter | Chemistry | FuseSchool
Learn the basics about the properties of oxygen. Oxygen is a gas, it has no smell, colour, or taste; but without it, we as humans would not be able to inhabit planet Earth. When cooled to a very low temperature, it will form a liquid and a solid which are both pale blue. Oxygen makes up
From playlist CHEMISTRY
The Terrifying Glow of Singlet Oxygen (ft. NileRed)
Singlet oxygen is a special excited version of normal molecular oxygen. In solution two singlet oxygen molecules crash into each other and release a flash of light which we see as a red glow. Today we explore two variants of a reaction that can produce this special excited state in what en
From playlist Highlights
Liquid oxygen accelerates styrofoam cup combustion
I poured a little liquid oxygen into a Styrofoam cup, then ignited it. The Styrofoam burns very quickly in the oxygen environment. At the end of the video, I stomped on the burning mess, and the confined combustion between my shoe and the ground creates a loud pop.
From playlist Chemistry and Materials
Correcting an error in the last video regarding hydrogen peroxide.
From playlist Chemistry
Mod-06 Lec-15 Electrical Conduction in Ceramics ( Contd .)
Advanced ceramics for strategic applications by Prof. H.S. Maiti,Department of Metallurgy and Material Science,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in
From playlist IIT Kharagpur: Advanced Ceramics for Strategic Applications | CosmoLearning.org Materials Science
Astronomy - Ch. 17: The Nature of Stars (22 of 37) Stellar Classification: Spectral Class
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain in more detail of stellar classification of spectra class. Next video can be seen at: http://youtu.be/hQQ2yoOoHVM
From playlist ASTRONOMY 17 STARS AND THE H-R DIAGRAM
Teach Astronomy - Planetary Nebulae
http://www.teachastronomy.com/ The most spectacular type of mass loss occurs in post-main sequence stars undergoing their planetary nebula phase. The name comes because the pale bubbles of gas looked like planets as seen through early small telescopes, but it's a misnomer. Planetary nebu
From playlist 15. Stars 2
7. Ellen Swallow Richards, Part 3
MIT 5.310 Laboratory Chemistry, Fall 2019 Instructor: John Dolhun View the complete course: https://ocw.mit.edu/5-310F19 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP63ZhyqhOGKbSBzcOovEbb6y Dr. Dolhun begins the final lecture of the Ellen Swallow Richards series with
From playlist MIT 5.310 Laboratory Chemistry, Fall 2019
Why cepheids pulsate | Stars, black holes and galaxies | Cosmology & Astronomy | Khan Academy
Why Cepheids Pulsate. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/v/why-gravity-gets-so-strong-near-dense-objects?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Missed the prev
From playlist Cosmology and astronomy | Physics | Khan Academy
What Are Redox Reactions? (Oxygen Exchange) | Reactions | Chemistry | FuseSchool
Learn the basics about the exchange of oxygen in oxidation-reduction reactions (REDOX) when learning about chemical reactions. In a chemical reaction, oxidation is oxygen GAIN and reduction is oxygen LOSS. A good example of oxidation is a combustion reaction. Hydrogen is a clean fuel tha
From playlist CHEMISTRY: Reactions
Period 3 | Trends, Properties and Reactions | Revision for Chemistry A-Level and IB
I want to help you achieve the grades you (and I) know you are capable of; these grades are the stepping stone to your future. Even if you don't want to study science or maths further, the grades you get now will open doors in the future. Study (daily and weekly) planners https://www.prim
From playlist Oxford AQA International A-Level Chemistry | Revision Playlist
Hey, guys! This video is about the reactions with liquid oxygen. The one about exotic thermits with Re2O7 is coming soon...mb =) ========== Reaction timing: 0:10 Burning cigarettes in liquid oxygen 0:53 LiH + O2 (Lithium hydride and liquid oxygen) 1:18 LiAlH4 + O2 (Lithium aluminum hydri
From playlist Oxidizers!
Physics - Modern Physics (23 of 26) Electron Jumps in Lithium
Visit http://ilectureonline.com for more math and science lectures! In this video I will show you how to find the wavelength of the electron jump in lithium (n=2 to n=3).
From playlist MODERN PHYSICS 2: ATOMIC AND NUCLEAR PHYSICS, PARTICLE PHYSICS
L2 NCEA Chemistry Balancing Redox Equations
This lesson showcases how to balance redox equations
From playlist Level 2 NCEA Chemistry
M72 - Variable Stars - Deep Sky Videos
Professor Mike Merrifield discusses variable stars in Messier 72 - also known as NGC 6981. More links and info in full description ↓↓↓ Paper featured in this video: https://academic.oup.com/mnras/article/413/2/1275/1069062 Professor Merrifield on Twitter: https://twitter.com/AstroMikeMer
From playlist Messier Objects
Lecture 02-Jack Simons Electronic Structure Theory- Hartree-Fock
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From playlist U of Utah: Jack Simons' Electronic Structure Theory course
Lec 13 | MIT 5.111 Principles of Chemical Science, Fall 2005
Breakdown of Octet Rule (Prof. Sylvia Ceyer) View the complete course: http://ocw.mit.edu/5-111F05 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 5.111 Principles of Chemical Science, Fall 2005
35. Acyl Insertions and [gr]α-Reactivity
Freshman Organic Chemistry II (CHEM 125B) When a nucleophilic atom bearing a good leaving group attacks a carbonyl group, an adjacent R group can migrate to the new atom, inserting it into the R-acyl bond. This mechanism can insert O, NH, or CH2 groups into the acyl bond with informativ
From playlist Freshman Organic Chemistry II with Michael McBride
Firing up a charcoal BBQ with liquid oxygen
I am pouring 1.5 liters of liquid oxygen on a bunch of smoldering charcoal briquettes. The oxygen rapidly turns to gas and accelerates the rate of combustion at the surface of the briquettes. Some of the charcoal fractures and shoots off tiny pieces that burn with a bright light. I ma
From playlist Chemistry and Materials