Curated Video
Measuring Astronomical Distances: The Light Year
This video provides an explanation of how astronomers measure vast distances in space using the concept of a light year. It clarifies that a light year is not a measure of time, but rather the distance that light travels in one year. The...
Curated Video
Stars and Galaxies: Measuring Distance with Light Years
This is a lecture presentation on stars and galaxies. The presenter starts by describing the general structure of our solar system and the Milky Way, which is one of the billions of galaxies in the universe. They explain how astronomical...
Astrum
How the Speed of Light Reveals the Strangeness of Our Universe
Why doesn't anything go faster than the speed of light? Want to see the world through the eyes of a scientist?
Curated Video
What is a Light Year?
When we look at distant stars, we are looking back in time. What is a light year, how is it measured and why do we measure distance in terms of time? Physics - Universe - Learning Points. Light travels through space at 300 million metres...
Physics Girl
We can see things moving faster than light
How is it possible for galaxies and objects in space to move away from us faster than the speed of light? Will we ever see those objects?
Curated Video
Why Is the Speed of Light Limited—and What If It Weren’t?
New ReviewWhy does the universe have an upper speed limit on the speed of light? Why isn’t the top limit infinite? Or what if the speed of light was not constant but changed in different reference frames? The speed of light is dependent on two...
Curated Video
What You Would Experience Near the Speed of Light
New ReviewAll the light that we see are electromagnetic waves. All different wavelengths are equivalent, except that waves of higher frequencies are more energetic. The speed of all these EM waves, however, is the same. It's the maximum speed...
SciShow
Understanding the Most Extreme Numbers in the Universe
Humans are great at understanding medium-sized things, like how far the supermarket is from your house, or how to find the bathroom in the dark. But imagining distances in light-years is a lot harder -- so you'll have to use a trick or two.
Curated Video
Measuring Speed in the Laboratory
This video is a lecture presentation on measuring speed in the laboratory. The presenter discusses the basic equation for speed and explains how to measure distance and time accurately using rulers, measuring tape, stopwatches, or light...
Curated Video
Understanding Braking Distance: How Speed and Braking Force Affect Stopping Distance
This is a lecture video on breaking distance. The speaker explains how drivers need to be able to stop their vehicles and highlights the importance of braking distance. They discuss how greater speed needs a greater braking force to stop...
KnowMo
Introduction to Distance-Time Graphs
The video is a lecture presentation on distance time graphs. It explains how distance time graphs record the journey of an object or a particle as it moves away and returns to a particular point. The presentation uses examples such as a...
NASA
NASA's Guide to Near-light-speed Travel
So, you've just put the finishing touches on upgrades to your spaceship, and now it can fly at almost the speed of light. We're not quite sure how you pulled it off, but congratulations! Before you fly off on your next vacation, however,...
Visual Learning Systems
The Nature of Light: Light Speed and Intensity
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...
Curated Video
Can Light Escape a Black Hole?
Light is affected by black holes because of the theory of general relativity, which states that any massive object warps the spacetime around it. Since a photon travels by the shortest distance between two points, light appears to bend...
Science ABC
Can Light Escape a Black Hole?
Light is affected by black holes because of the theory of general relativity, which states that any massive object warps the spacetime around it. Since a photon travels by the shortest distance between two points, light appears to bend...
ProTeachersVideo
Hard To Teach - Secondary Science Using ICT: Investigating Acceleration with Year 9 Using Light Gates
Paul Preece at Camborne Science and Community College and his class of Year 9s investigate acceleration with the traditional trolley rolling experiment. Here the pupils use light gates to accurately capture the speed of the passing...
Let's Tute
Understanding Light and the Electromagnetic Spectrum
The video discusses the concept of light as a type of electromagnetic radiation and explains the different types of radiations in the electromagnetic spectrum based on their wavelength, frequency, and energy. It also highlights the...
Curated Video
The Sun as a light source – True or false
True or false ... It takes eight and a half minutes for light from the Sun to travel to our planet? Physical processes - Light - The Sun as a light source Learning Points It takes eight and a half minutes for light from the Sun to travel...
Next Animation Studio
MIT researchers publish study on traffic-light-free 'smart intersection'
Researchers at MIT have published a study outlining the basis for a potential traffic-light-free transportation design that, if developed, could allow twice as many cars to travel smoothly on the road.
NASA
NASA’s Roman Mission Will Use Exploding Stars to Measure Cosmic Distances
NASA’s upcoming Nancy Grace Roman Space Telescope will see thousands of exploding stars called supernovae across vast stretches of time and space. Using these observations, astronomers aim to shine a light on several cosmic mysteries,...
Crash Course
Special Relativity: Crash Course Physics
So we've all heard of relativity, right? But... what is relativity? And how does it relate to light? And motion? In this episode of Crash Course Physics, Shini talks to us about perspective, observation, and how relativity is REALLY weird!
Curated Video
Telescopes: Time Machines into the Distant Past
This video explains how telescopes can act as time machines, allowing us to see objects in space as they appeared millions of years ago. By measuring distances in light years and understanding the speed of light, scientists can observe...
TED Talks
Patricia Burchat: Shedding light on dark matter
Physicist Patricia Burchat sheds light on two basic ingredients of our universe: dark matter and dark energy. Comprising 96% of the universe between them, they can't be directly measured, but their influence is immense.
Curated Video
Force, Mass and Acceleration Experiment: Methods and Results
The video is a lecture presentation about the force, mass and acceleration experiment. It discusses how to apply force to an object, measure that force, and measure the resulting acceleration. The presentation covers methods of applying...