Light and Shadow

Optics

Physics

"Delta Phi"

by Joachim Sauter The chrome-plated surface of the exhibit resembles a strongly moving water surface. Illuminated from above with a torch, the incoming light…

2x2 Puzzle

Four cubes fit together in the box. Each cube has 4 quarter-pictures, one on each of 4 faces. The other two faces are transparent, BUT they look onto the…

847 Compass needles

There are 847 compass needles attached to a disc. Because they are so close together, they influence each other. With a magnet, the compass needles can be made…

A Slice of Turbulence

by Ned Kahn If the crest of the wave collapsed over the surfer off Hawaii and he could bring home a slice of salami from it, he would have the original to the…

Additive Color Mixing

Light colours are mixed quite differently from paint colours. We have known since childhood that many colours mixed together in a pot of paint produce a dark…

Adhesive Air

Air is blown through a large funnel. Stand in front of it, but you will hardly feel it. If you now push the funnel slightly backwards, you will suddenly feel…

Aeolian Landscape

by Ned Kahn Alongside water and ice, wind is the shaping element of the natural landscape. This exhibit allows for the pleasurable "terraforming" of gently…

After Image

Not seeing nothing, but seeing nothing! A strong flash of light triggers a photochemical process on our retina. However, this process lasts longer than the…

Air Bubbles

A pump can be used to force air into a water-filled glass tube. However, not all air bubbles rise vertically. Some do, others choose more of a zigzag or spiral…

Air cushion

Inventive talent is called for here! Use scissors and tape to build objects out of paper that float on the wide air cushion. While testing and optimising, you…

Air Fountain

This exhibit is not accessible during the winter months. by Daniel Wurtzel A large kinetic sculpture with lots of air. Air flows from the side of a round,…

Air lift

A hole in the middle of the table, a tube open at both ends in the hole and a fan in front of it. In this tube there is a free-moving ball that is secured…

Air Mirror

Sit comfortably and check the stripy view at the end of the road. Now heat up the road. (A solid steel plate rapidly heats to 100°, warming the dark sand of…

All Triangels are the same

Using different triangular shapes, congruent shadows are to be cast on a pattern wall with equilateral triangles.

Anamorphic Images: Cone

On a flat surface the images are distorted beyond recognition – a peculiar visual code requiring a special key. Slip the square sheets over the reflective…

Anamorphic Images: Cylinder

On a flat surface, the images are distorted beyond recognition - a special visual code needs a special key. Put the square panels over the reflective cylinder:…

Angled Mirrors

With two mirrors that can be brought to different angles to each other around an axis, polygons (so-called polygons) can be made in a simple way. At very…

Aurora

A strange "mirror" distorts points of light into long, luminous bands, comparable to the interplay of water and light when the sun rises. Why don't you just…

Back View

Step forward to check how neat (or not….) your bum really looks in those cool new jeans: every clothes’ store should have this back-view booth!

Ball in a Bowl

Anyone who has ever swung a hula hoop around their waist or a daler in a bowl knows what this is all about. Inside a large Plexiglas ball, two balls can be…

Ball in a Bowl

Which of the two balls reaches its destination faster? Of course, the one that runs the shortest distance between the start and the finish - or so you…

Ball on water-beam

What makes table tennis balls stick to the water fountain? Obviously, the ball does not ride in the middle of the jet and rotates so that it comes towards the…

Banana

If you place a blue filter exactly on the yellow banana, the banana appears green - logical, isn't it? A larger blue filter that also covers the white…

Barium

Here you can see a piece of barium that weighs approx. 1 gram and consists of about 4.4 trilliards atoms. How heavy, do you think, 10 barium atoms are?