Displaying results which match all of the below:

    More detailed CMB image with the signal from our Galaxy removed showing temperature fluctuations of +-200 microKelvin

  • Focal length How to measure it

    Short animation showing how to measure the focal length of a lens

  • Global warming

    Al Gore giving a short talk about Global Warming

  • Handout - Reflection

    Handout showing red laser light being reflected and refracted by a semicircular glass (plastic) block. Light is refracted at angles less than the critical angle and reflected at angles greater than the critical.

  • Handout - Refraction

    Handout showing red laser light being refracted by a semicircular block and an illustration of a spectrum being formed by refraction

  • Handout - Refraction (magic)

    Optical illusions using refraction

  • Handout - Scanning by reflection

    Some examples of where ultrasound can be used

  • Handout - Seismic waves

    Handout showing p and s waves and how they provide evidence for the structure of the Earth's interior.

  • Herschel - infra red

    Short video (9.58 min) starting with Herschel's discovery and then looking at infrared in more detail. The last 3 mins are basically a sales pitch but the infrared images are interesting

  • How to remember the electromagnetic spectrum

    Very simple, short (2.08), video telling a silly story to help remember the order of the electromagnetic spectrum. I particularly like the nmemonic at the end

  • Longitudinal wave

    Simple, clear animation showing a longitudinal wave

  • Ritter - UV

    Starting with Ritter's experiment with photographic paper, this short video (3.40) goes on to look at UV-A, UV-B and UV-C before going on to briefly descrive their use in space exploration

  • s & p waves

    Very short clip showing how s and p waves move through the Earth.

  • Sonar (ultrasound)

    Knowing the speed of sound in water, the formula speed = distance / time and a computer, it is possible to use ultrasound to produce an image of the sea bed.

  • Sonar How it works

    Explanation of how sonar is being used to map the sea floor in the caribbean.

  • The Electromagnetic Spectrum - Microwaves

    Short video (3.23). Looking in a bit more depth at microwave radiation. Includes CMB

  • The Electromagnetic Spectrum - NASA

    Introduction to the elctromagnetic spectrum with links to each of the areas.

  • The Electromagnetic Spectrum - NASA

    Short video (5.20). Introduction to the electromagnetic spectrum with a look at each of the wavelengths in turn.

  • The Electromagnetic Spectrum - Radio Waves

    Short video (3.58). Looking in a bit more depth at radio waves from their first transmission at the end of the 19th Century.

  • Transverse and longitudinal wave

    Very short video showing longitudinal waves and transverse waves in a slinky

  • Ultrasound communication bottlenose dolphin

    Short nature film showing how ultrasound is useful to bottlenose dolphins

  • Ultrasound How it works

    Nice explanation of how ultrasound works