Curated Video
Screaming Out for an Alternative
Particle physicist Nima Arkani-Hamed (Institute for Advanced Study) highlights the clues pointing us towards the need for re-addressing core issues of quantum field theory.
Curated Video
Light Cones and World Lines
Nobel Laureate in Physics Roger Penrose (Oxford) describes how, according to Einstein's special relativity, massive and massless particles move with respect to the light cones of space-time.
Visual Learning Systems
The Nature of Light: Light Creation
Students will learn about the different frequencies along the electromagnetic spectrum. Vivid animation is used to explore the visible spectrum of light and the colors it allows us to see everyday. The video also investigates various...
Looking Glass Universe
Quantum Entanglement and the EPR Paradox
What is entanglement really? And why is it that its a uniquely quantum phenomena? Bohmian mechanics stuff: In Bohmian mechanics, you still have superpositions, they just mean something very different. A Bohmian mech particle only has one...
Physics Girl
Quantum Cryptography Explained
With recent high-profile security decryption cases, encryption is more important than ever. Much of your browser usage and your smartphone data is encrypted. But what does that process actually entail? And when computers get smarter and...
Curated Video
What is the Heisenberg Uncertainty Principle: Explained in Simple Words
Heisenbergβs uncertainty principle says that if we know everything about where a particle is located, we know nothing about its momentum. Conversely, if we know everything about its momentum, then we know nothing about where the particle...
Catalyst University
General Chemistry | Calculating Frequency (Ξ»), Wavelength (π), & Energy
In this video, we use the following equations to interconvert between and do calculations with Frequency (Ξ»), Wavelength (π), & Energy: 1) E=hπ 2) π=c/Ξ» 3) E=hc/Ξ»
NASA
NASA | CATS in Space Keep Eyes on Atmosphere
NASA Goddard is preparing to demonstrate for the fist time in space, a 3-wavelength, laser remote sensing instrument. The Cloud-Aerosol Transport System or CATS will measure clouds and aerosols in the Earth's atmosphere. This...
NASA
NASA | Mars Atmosphere Loss: Plasma Processes
Mars's thick early atmosphere was likely lost to space, and the Sun is a potential culprit. When high-energy solar photons strike the upper Martian atmosphere they can ionize gas molecules, causing the atmosphere to erode over time.
Science360
What do we know about black holes?
What do we know about black holes? Joe Pesce, a National Science Foundation astrophysicist, answers the question on this edition of "Ask a Scientist."
NASA
Photon Phriday' Digs Deep for Western U.S. SnowEx Campaign
Snow is vital for Earthβs ecosystems and humans, from its temperature-regulating reflection of sunlight and insulating properties, to its life-sustaining water as it melts in the springtime. Snow provides freshwater for drinking,...
NASA
Timing Is Everything
Deputy Systems Engineer Phil Luers explains how ICESat-2βs ATLAS instrument transmitter and receiver subsystems come together to calculate the timing of photons, which, in turn, measure the elevation of ice. Credits: Ryan Fitzgibbons;...
NASA
Photon Jump
Pho, a plucky bright green photon of light, must travel from a NASA spacecraft down to Earth and back again to help complete a crucial science mission in this educational short film. The animation was created and produced by media art...
Physics Girl
This crystal can split light particles
How unusual non-linear crystals can entangle particles of light, or photons. Thanks to non-profit edX.org for sponsoring this video. Quantum entanglement involves a special process of splitting photons into two. But it involves a process...
NASA
ICESat-2 Celebrates One Year for Photon Phriday
Photon Phriday is a weekly look at what ICESat-2 is measuring as it orbits the Earth. ICESat-2 Project Scientist Tom Neumann takes a look back at some recent passes in celebration of the first year on orbit for the mission. Follow...
NASA
New NASA Satellite Reveals Profiles of Ice, Forests and Oceans
Less than three months into its mission, NASA's Ice, Cloud and land Elevation Satellite-2, or ICESat-2, is already exceeding scientists' expectations. The satellite is measuring the height of sea ice to within an inch, tracing the...
NASA
NASA's ICESat-2 Looks Beyond the Icy Poles
ICESat-2's main science objective is ice, but the mission is also able to measure the heights of other features, including ocean bathymetry, trees and mountain glaciers. Ryan Fitzgibbons (USRA): Lead Producer Aaron E. Lepsch (ADNET):...
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
Quantum Electrodynamics (QED)
In our study of physics, we have become aware of four forces, and the fields that mediate them. Once we got deep into quantum theory, we started to realize that these forces are not mediated by fields at all, but rather by quanta. That's...
Professor Dave Explains
Quantization of Energy Part 2: Photons, Electrons, and Wave-Particle Duality
So Max Planck kicked things off, but how does the story of modern physics continue? With none other than your favorite scientist and mine, Albert Einstein! He did more than just stick his tongue out and have crazy hair. He elucidated the...
msvgo
Atomic Masses and Composition of Nucleus
This nugget describes the nucleus of an atom. It talks about the various aspects of a nucleus like atomic number, atomic mass unit, isotopes and isobars, with examples.