6 Optics

Crossed Gratings & Laser

Catalog: 
6D20.50
Location: 
Ga3
A laser beam passes throught two crossed gratings of various types.

Arago's (Poisson's) spot

Laser and Lens.
Catalog: 
6C20.10A
Location: 
Ga3
Shine a diffused laser beam at a small sphere or disk. The projected image shows Argo's spot.

Acrylic/lead glass refraction - Video

demonstration image
Catalog: 
6A42.47
Location: 
3_1
Video Encyclopedia :Hold a stick behind stacked lead glass and acrylic blocks. The image of the stick is shifted when viewed off the normal to the surface of the blocks.

Microwave polarization

The receiver's antenna is oreinted parallel to the direction of polarization.
Catalog: 
6H10.20A
Location: 
Dc2
Microwave polarization

Lens magnification - Video

demonstration image
Catalog: 
6A60.35
Location: 
3_1
Video Encyclopedia :Place various lenses between a backlit grid and the class.

Three prism stack - Video

demonstration image
Catalog: 
6A42.51
Location: 
3_1
Video Encyclopedia :A stack of three prisms of different glass, and index of refraction, shows different refraction and dispersion.

Karo Syrup Tank

Many colors can be seen as more syrup is added or the polaroid sheet is turned.
Catalog: 
6H30.40A
Location: 
Gc3, PS H359(ref.)
Fill a glass container with Karo syrup and insert glass objects (lenses). View the collection with crossed Polaroids on the overhead projector.

Pinhole camera - Video

demonstration image
Catalog: 
6A61.20B
Location: 
3_1
Video Encyclopedia :Project a lamp filament onto a screen. Vary the distance of the screen and the size of the pinhole. Includes animation.

Critical angle/total internal refl.-Video

demonstration image
Catalog: 
6A44.20B
Location: 
3_1
Video Encyclopedia :Shine a beam through the side of a tank containing fluorscein. Rotate a mirror in the tank so the beam passes through the critical angle.

Two calcite crystals

Two images show up from the printed material below. Rotate the crystal and obser
Catalog: 
6H35.10
Location: 
Gc2
Calcite crystals - birefringence

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