This video explores the fate of the universe from an historical position. It explains how the rate of expansion of the universe can be measured.

This video provides a brief introduction to the seven base units used in physics. Base units are identified with their symbols and S.I units.

The origin and definition of the metre is explained and reference to Wikipedia is made for definitions of the other base units....

This video explains the difference between unpolarised light and plane polarised light in terms of using a slit to eliminate unwanted electric wave orientations. It is a continuation of Electromagnetic waves: why they are transverse....

This video explains how a Ruben’s tube can be used to demonstrate standings waves, nodes and antinodes (sound).  The flow of flammable gas is affected by sound waves (vibrations). A 2D model of a Ruben’s tube is used to demonstrate a series of standing waves.

This short video explains the importance of being aware of symbols for quantities (both scalar and vector) and units.  Physics uses letters from our alphabet (both upper and lowercase letter) and from other alphabets (e.g., λ, lambda and θ, theta).

This video explains how zero point energy in helium-3 and helium-4 atoms means that atoms, even at absolute zero vibrate. The smaller size of the helium-3 means it vibrates more.  In a mixture of helium-3 and helium-4 the helium-3 atoms can get closer to helium-4 than to other helium-3 (less vibration in helium-4...

This video will challenge students. It shows how particle spins of entangled particles and employing the conservation of angular momentum, can be used to solve a problem that Einstein found rather frustrating. The problem: If we measure the spin of one of the particles we automatically know the other, because it...