Clip description Keywords
Analogue and digital signals
Analogue and digital signals

Duration: 03:07

An explanation using CDs and vinyl records in order to explain the differences between digital and analogue signals.

 
Aurora borealis in Norway
Aurora borealis in Norway

Duration: 03:39

Two scientists witness the aurora borealis or Northern Lights from Norway.

 
Earthquakes in Great Britain
Earthquakes in Great Britain

Duration: 04:05

The British Geological Survey is to open a new monitoring station in Lincolnshire almost a year after the biggest earthquake to hit the UK in 25 years.

 
Reflection, refraction and diffraction
Reflection, refraction and diffraction

Duration: 02:51

Animated diagrams showing reflection, refraction and diffraction.

 
Surfing the Severn bore
Surfing the Severn bore

Duration: 00:24

The power of the River Severn can be seen in the Severn bore - a large tidal wave that moves up the estuary and is popular with river surfing enthusiasts.

 
The 2009 Costa Rica Earthquake
The 2009 Costa Rica Earthquake

Duration: 01:46

A news report about a strong earthquake, measuring 6.2 on the Richter scale, which struck Costa Rica in January 2009.

 
The effects of UV light on our skin
The effects of UV light on our skin

Duration: 01:09

An introduction to UV light and the cancerous effects it has on skin. Describes the production of melanin and Vitamin D by the skin.

 
The electromagnetic spectrum
The electromagnetic spectrum

Duration: 02:41

The nature of the different types of electromagnetic radiation is illustrated using animations.

 
Transverse and longitudinal waves
Transverse and longitudinal waves

Duration: 02:51

Transverse and longitudinal waves are compared.

 
Uses of electromagnetic waves
Uses of electromagnetic waves

Duration: 02:11

Summarises common uses of electromagnetic waves.

 
UVA - electromagnetic spectrum
UVA - electromagnetic spectrum

Duration: 03:58

The position of ultra violet radiation within the electromagnetic spectrum and its use in laser eye surgery.

 

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