TED-Ed
TED-Ed: How scientists are creating real-life invisibility cloaks | Max G. Levy
A spy presses a button on their suit and blinks out of sight. A wizard wraps himself in a cloak and disappears. A star pilot flicks a switch, and their ship vanishes into space. Invisibility is one of the most tantalizing powers in...
SciShow
The Strange Effects of Diamond Dust
Bright pillars of light... clouds of glowing dust... shimmering discs floating around the sun... signs of extraterrestrial activity, or is there a more rational and scientific explanation for this phenomenon?
MinuteEarth
Why Wolves Don't Chirp
Sounds that animals make can be really different, and it turns out that there's a reason why some species communicate with certain sounds.
MinuteEarth
How To Hear Halfway Around The World
Sounds in the ocean can travel more than 10,000 miles - that's halfway around the world! Here's how.
SciShow
Its True The Sun Really Does Flash Green
The mythical green flash at sunset isn't actually a myth! Stefan explains why it happens, and how you can see it.
Bozeman Science
Waves
Mr. Andersen introduces the concept of waves. Both transverse and logitudinal waves are described. The relationship between wave speed, wave frequency and wavelength is also included.
SciShow
The Strange Effects of Diamond Dust
Bright pillars of light... clouds of glowing dust... shimmering discs floating around the sun... signs of extraterrestrial activity, or is there a more rational and scientific explanation for this phenomenon?
Bozeman Science
PS4B - Electromagnetic Radiation
In this video Paul Andersen describes some of the properties of electromagnetic radiation. The electromagnetic spectrum varies by wavelength from radio waves to gamma rays. We only see a portion of the spectrum known as visible light. A...
SciShow
Cloaking Devices!
Hank pretends he has an invisibility cloak, and describes how some enterprising scientists are working towards making things invisible using nanotechnology and mirages.
Bozeman Science
Ray Diagrams - Lenses
In this video Paul Andersen explains how ray diagrams for lenses can be used to determine the size and location of a refracted image. Images may be either real or virtual images. Ray diagrams for converging and diverging lenses are...
Bozeman Science
Refraction of Light
In this video Paul Andersen explains how light can be refracted, or bent, as it moves from one medium to another. The amount of refraction is determined by the angle of incidence and the index of refraction. Snell's Law can be used to...
SciShow
6 Creative Ways People Used to Navigate the Oceans
People have been exploring the oceans since prehistoric times, way before they had GPS to help them figure out where they were. Here are 6 ingenious ways our ancestors navigated the oceans.
SciShow
How Do Rainbows Form?
SciShow explains how three important ingredients -- sunlight, water, and you -- interact to create the illusion of a rainbow. The colorful details are inside!
Curated Video
How Does Light Slow Down in a Medium?
SUMMARY Why does the speed of light change in different media? or Does it? How photons always travel at the same speed, but the speed of light changes. In 1905 Einstein proposed the theory of special relativity. One of the postulates was...
Curated Video
Focusing light
Pupil outcome: I can explain how light from an object can be focused by a converging lens to form an image. Key learning points: - Some of the light from objects can pass through a lens and become focused to form an image on a screen. -...
Veritasium
How Microwaving Grapes Makes Plasma
A bisected grape in the microwave makes plasma. But how does it work? A grape is the right size and refractive index to trap microwaves inside it. When you place two (or two halves) close together the fields interact with each other...
Science ABC
Why Do You See Colorful Rainbow Patches On A Wet Road?
The appearance of patches of different colors on roads on a rainy day is due to a combination of oil, water, and light rays. When it rains, the oil on the road comes in contact with water, and the light rays bounce off the surface of the...
Curated Video
Lens
A transparent material shaped to refract light, such that it converges or diverges from a single point. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
Curated Video
Prism
A transparent object with flat surfaces that refracts light. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...
Curated Video
Refraction
The change in direction of a wave caused by its change in velocity, as it moves from one medium into another. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
Curated Video
Fibre Optics
Light can be transported over huge distances via fibre optic cables, losing virtually no information. How is this possible? Physics - Waves - Learning Points. Fibre-optic cables carry information from our phones and computers as light. A...
Curated Video
Resonance: How Sound Changes Across Different Mediums
Sounds can change as they move from one medium to another. Under the right circumstances the effect is surprising and extreme. Physics - Waves - Learning Points. Sound is a wave that is created by vibrating objects. Every object has a...