Stations-ID: A002

?? English instruction:

Can you stand straight? Check yourself and the others, in what angle are you standing to the floor?

• Position the moveable wooden channel straightly. You can check if you’re right by placing a marble on it.

• The pendulum points straight down after being taken out of it’s holder.

• Using a wooden marble, give a guess as to which one of the boxes the tip of the pendulum will point at.

• Where does the marble have to start to be able to traverse the whole marble track?

Not only in Jena can you find leaning houses. A timbred house in Ulm dating from the 14th century is advertized as the most crooked hotel in the world. The Oberhafenkantine in Hamburg, the old fulling mill in Wernigenrode and the ‘leaning houses’ in Idstein and Großbottwar are also clearly out of balance.

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Stations-ID: A008

?? English instruction:

Two people stand in the opposite corner of the room.
The others watch from outside the house. Which of the two people inside the
house seem taller?
• Examine the shape of the room. What angles and surfaces can you see?
• Which of the two people is standing closer to you? Which one looks bigger?
This construction is based on the work of the American optician Adelbert Ames
who probably built on Hermann Helmholtz’s ideas. This optical illusion finds a
very practical use in the film industry; In the ‘Lord of the Rings’ films, the
scenes involving hobbits and humans where shot in trapeze-shaped, distorted
sets to create the illusion of difference in size.

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Stations-ID: D012

?? English instruction:

• Spin the disk slowly.
• Concentrate your gaze on the centre of the spiral for approximately one
minute.
• Then turn your gaze to a motionless object, like your hand, or the wall.
• What can you see?
• What happens when the spiral is moving in the other direction?

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Stations-ID: D010

?? English instruction:

Spin the wooden disk slowly and look at it from a distance of 2 meters.
• What kind of patterns can you see on the disc?
• What do the patterns look like when the disc is rotating?

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Stations-ID: D018

?? English instruction:

• What colours are in the pictures on the wall or your clothing?
• What colour does normal day-light or the light of the hand lamp have?
• What do the colours look like in white light?
• What colour does the sodium vapour lamp in this room have?
„Rays are not colored.“
Sir Isaac Newton (1642-1827)

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Stations-ID: D056

Stations-ID: D011

?? English instruction:

Position yourself one meter away from the disc and try not to fix a point, but let the whole thing work on you.

What do you observe?

In contrast to the other discs in this area, this disc cannot be rotated.

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Stations-ID: D045

Stations-ID: D073

Stations-ID: D059

Stations-ID: D051

?? English instruction:

• Take one of the wheels out of its slot and hold it in front of your face, so that
you are looking at its black back.
• Now look at the mirror through the uppermost slot with one eye. Spin the
wheel – slowly at first, then faster. First to the right, then to the left.
• What do you see on the disc?
• What do you see in the mirror when you look through the slots in the disc
while it is rotating?
• What happens when the rotation is very slow?
• What do you see when looking directly onto the rotating disc?

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Stations-ID: D013

?? English instruction:

What do you see in blacklight?
• Examine the documents in the showcase, what do they look like in daylight?
• What do your clothes look like in blacklight?
• Smile at each other and you will be surprised!

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Stations-ID: D041

?? English instruction:

Two people stand at the edges of the mirror facing each other.
Stand at the edge of the mirror in such a way that one leg is behind and one leg
is in front of the mirror, so that only half of your body can be seen. To keep your
balance you can also hold on to the bar behind the mirror. Now raise your leg in
front of the mirror and watch each other’s mirror image.
Do you have more ideas for similar illusions?
• What do you see? What do the others see?

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Stations-ID: D009

?? English instruction:

Concentrate your gaze on the striped wall and balance on one leg at the same time.

Now your partner makes the wall swing sideways.

• How long are you able to stand on one leg?

• What happens when you close your eyes?

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Stations-ID: D019

?? English instruction:

Stand between both mirrors.

Compare this experiment with the mirror tunnel – what are the similarities, what are the differences?

• Look at your mirror images – how often can you see yourself from the front and from behind?

• What would you see if the mirrors were standing parallel to each other?

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Stations-ID: D044

?? English instruction:

Two mirrors are standing parallel to each other and a small slot allows the view into the infinite.

• Hold your hand into the Mirror Tunnel while you are looking through the slot – how often can you see it?

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Stations-ID: D058

?? English instruction:

In front of you, you find a twisted space. Where is up and down?

• Step through the door and lie in different positions. Can you fly?

• Observers can see you from the wooden stairs.

Please take off your shoes before entering.

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