New Demonstrations
| Title | Abstract | ||||||
|---|---|---|---|---|---|---|---|
English |
te Reo |
Visit | Type | Physics NCEA |
Science NCEA & SciNZ |
||
| Bouncing Magnet | A very large, very strong rare earth magnet is dropped onto a copper block cooled in liquid nitrogen. The magnet is seen to bounce 'off the field' a few centimetres above the copper block. This surprising behaviour cannot be explained using Faraday’s law and Lenz’s law alone. Why does the magnet bounce? |  |
Video | 2.6 University |
|||
| Cold, Colder, Coldest | Ice water glows strongly on an infrared thermal camera compared to nearby dry ice and liquid nitrogen. | |
 |
Notes | 1.2 | ||
| Web Cam Vision | Digital cameras are remarkably similar in construction to the human eye. The photos show a dissected webcam and reveal its inner workings. | |
|
Notes | Jnr 1.3 |
||
| Peripheral Vision LED |
An LED powered by a square wave signal appears continuous in centre vision but is seen to flash in peripheral vision | |
|
Notes | |||
| Temporal Colour Mixing | A square wave signal applied to a bi-directional LED demontrates temporal mixing of colours: a light that flashes red-green-red-green rapidly will appear yellow. | |
|
Video | Jnr | ||