Secondary Catalogue
Physics
Phases of the Moon
We determine the length of a month by tracking the orbit of the Moon. This video explains eclipses, the different phases of the Moon and why these phenomena occur, and how different cultures around the world understand and observe the lunar cycle.
The Spherical Earth
For centuries, the ancient world believed that the Earth was flat. This video explores the history and discovery of the spherical Earth, and the importance of astronomy to both indigenous cultures and scientific discoveries throughout history.
Day and Night
Though it might seem like the Sun rises and sets, it is actually the Earth that is moving. This video explains how this rotation creates day and night and how this cycle has influenced the way we measure a day and observe time throughout history.
Colours, Waves and Particles
Every time you’re seeing an object, it’s all thanks to light. This video explains electromagnetic radiation, the visible light spectrum and how light travels as waves but behaves as particles, through engaging visuals and informative diagrams.
Refraction, Lenses and Polarisation
When light travels from one medium into another, its speed changes – that’s refraction! This video demonstrates refractions and explains how lenses work and how polarisation filters light, through engaging visuals and informative diagrams.
Reflection and Mirrors
Objects can only be seen because they reflect light. This video explains how objects absorb and reflect different wavelengths, how mirrors work, and why the shape of a surface impacts reflection, through engaging visuals and informative diagrams.
Beta-Minus and Gamma Radiation
Shedding Light on Nuclear Radiation
This video looks at what beta-minus and gamma radiation are, and how thye are put to good use in medicine and in industry.
Alpha Radiation
Shedding Light on Nuclear Radiation
In this episode, we look at what alpha particles are, introduce students to nuclear equations, and show how alpha-emitting substances are used to power space probes and to treat certain types of cancer.
Atomic Structure
Shedding Light on Nuclear Radiation
In the first episode of this series, we lay down the foundation on which the series is built: what atoms are made of and how atoms differ. We look at protons, neutrons, electrons and learn about isotopes and nuclides.
The Earth, Sun and Moon
Did you know that the sun is bigger than the Earth and the moon put together? Or that the sun is over 4600 million years old? In this video you'll learn lots of interesting facts about the Sun, Earth and Moon.
A Brief History of Wind Power
Did you know that the earliest known example of a wind-driven wheel to power a machine was made by Hero of Alexandria in Ancient Greece? It powered an organ! This video traces the history of wind power from 10-70 CE to today.
Telling the Time with Sundials
You may know how to read the time on a digital clock, and probably on an analogue too, right? But do you know how to read a sundial? And how do they work? This video answers those questions.
How Are Relays Used in Circuits?
We explore how relays are used in circuits, how LDRs and thermistors could be used in such circuits, and how these components can be recognised.
How Does the Earth Orbit the Sun?
We explore how day and night and the seasons are created by the Earth’s orbit, and of how the phases of the moon are created by the moon’s orbit around the Earth.
How Is Resistance Measured in a Wire?
Resistance lowers the current and the rate of electrons flowing through something. How does this happen in wires and how is it measured?
How Are Objects Charged by Friction?
Friction charges objects by rubbing electrons from one object onto another, leaving one object positive and the other negative.
What Is a Converging Lens and How Does It Work?
This film explains how converging lenses work and their applications.