SciShow
Blue Is Pretty Special: How Nature Gets the Blues
It's really difficult for life to create blue pigments, but the color can appear in a handful of compounds that create just the right conditions to reflect blue photons.
SciShow
Airglow: Why The Night Sky Is Really Green
If you look closely enough, you'll see the night sky is actually a little green. SciShow Space explains the science behind the phenomenon known as airglow.
SciShow
The Cosmic Lasers That Form in Outer Space
Lasers are incredible narrow beams of light we can use to do everything from cutting metal to operating on people's eyeballs. But even though we came up with the idea on our own, humans didn’t actually make the first lasers.
Crash Course
Nuclear Chemistry: Crash Course Chemistry
In this episode, Hank welcomes you to the new age, to the new age, welcome to the new age. Here he'll talk about transmutation among elements, isotopes, calculating half-life, radioactive decay, and spontaneous fission. -- Table of...
Curated Video
Bohr's Atomic Model: Electrons in Orbit
In 1913, Niels Bohr proposed an atomic model that dramatically altered our comprehension of atomic structure by establishing a novel framework for describing the arrangement and behaviour of electrons within an atom. The purpose of...
Curated Video
Spontaneous emission
The process in which an atom or molecule produces a photon of light when it undergoes a spontaneous transition from an excited state to a lower energy level. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds...
Higgsino Physics
The simple physics of a laser
The physics of a laser - how it works. How the atom interacts with light. I’ll use this knowledge to simulate a working laser. We will learn how LASERs relies on Stimulated absorption, Spontaneous emission, and most importantly:...
FuseSchool
PHYSICS - Radiation - Excited Electrons & Fluorescence
Emitting Radiation | Radioactivity | Physics | FuseSchool What do you think of when you hear the phrase “emitting radiation”? Do you think it’s a good thing or a bad thing? What if I told you it was vital for life on Earth? In this video...
msvgo
Bohr Model of the Hydrogen Atom
This nugget explains the features and mathematical expressions of Bohr's model and its advantages over Rutherford's model.
Catalyst University
UV-Vis Spectroscopy: Theory and "How do I know when to use it?"
UV-Vis Spectroscopy: Theory and "How do I know when to use it?"
Science360
Science Behind The News: Quantum Computing
Imagine if engineers could build a computer to be millions of times faster than anything that exists today, yet so small it's microscopic. John Preskill, a theoretical physicist at the California Institute of Technology, explains the...
Catalyst University
Internal Conversion and Photoprotection: Applications in Biochemistry
Internal Conversion and Photoprotection: Applications in Biochemistry
Catalyst University
Photosystem II Function: The P680 Reaction Center
Photosystem II Function: The P680 Reaction Center
Professor Dave Explains
Practice Problem: The Bohr Model and Photon Wavelength
With the Bohr model we start to get a better sense of the nature of matter, particularly the way light interacts with atomic matter such that we can see it. But how do we do calculations regarding these interactions? Let's practice now!
Catalyst University
Resonance Fluorescence: A Special Case of Fluorescence
Resonance Fluorescence: A Special Case of Fluorescence
Professor Dave Explains
The Quantum Harmonic Oscillator Part 3: Interpretation and Application
With the Schrödinger equation for the quantum harmonic oscillator solved, we are ready to analyze and interpret our results. What can we learn from the probability density function? How does the probability of finding a quantum particle...
msvgo
Radioactivity
This nugget explains the concept of radioactivity, its types and mathematical expressions and examples.
Professor Dave Explains
Crystal Field Theory
We are used to using a theory like VSEPR theory to predict molecular geometry, but unfortunately with coordination compounds, things are not so simple, because of those pesky d orbitals on the central metal atom. Crystal field theory is...
Catalyst University
Melanin Physiology: Melanin Absoprtion of UV Light and Internal Conversion to Heat
Melanin Physiology: Melanin Absoprtion of UV Light and Internal Conversion to Heat