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Ultrasond and infrasound (BBC Bitesize)
Read all about ultrasound and infrasound and their uses. Then try the activity and do the test!

Making a telescope (Practical Physics)
How to do an experiment to make a telescope that works!

Amazing Space!
Choose one of the topics and learn more about telescopes, spectra, galaxies, comets and gravity. Get some help with your homework by selecting Homework Help on the left hand side.

Sound waves and interference of sound using interactive animations (PhET)
Run the simulation. This simulation lets you see sound waves. Adjust the frequency or volume and you can see and hear how the wave changes. Move the listener around and hear what she hears.

Echolocation (Kitchen Science)
Follow the instructions to use microphones and a laptop with Audacity to show how ultrasound scanning works.

Ray diagrams for plane mirrors
How to construct ray diagrams for plane mirrors

Step by step ray diagrams for convex lenses
How to construct a ray diagram step-by-step for converging lenses.

Geometric Optics Animation
Change the position of the object and look at what happens to the image. Work out what is happening using what you know about rays.

Jelly Optical Fibre
Find out about total internal reflection using a optical fibre made of jelly.

Bending Light Animation
Play with refraction! Use a ray model or a wave model to look at what happens when light goes from one material into another.

General properties of waves (Bitesize)
Read all about properties of waves, wave speed and ray diagrams. Then try the activity and do the test!

Sound and light (BBC Bitesize)
Read all about sound and the electromagnetic spectrum. Then try the activity and do the test!

Sound in Steelmaking
Learn all about sound and hearing, and how to protect your hearing, by reading the pages and trying the questions at the bottom. Click on the 'page' button at the top right of the page to see more.

Optics - reflection, refraction and more
Find out about images, reflection, refraction, critical angle, including equations.

Pepper's Ghost
Watch the video to find out how people did magic tricks using glass and reflection

Investigating spectra (Practical Physics)
How to to investigate spectra - sunlight, using gratings, hot objects and more.

Optics experiments (Practical Physics)
How to do experiments to show the action of lenses, pinhole cameras, reflection, refraction, the eye,

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 immune system
 blood cells
 ray diagrams
 plane and spherical mirrors
 sound and sonar
 the eye
 total internal reflection
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