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.

Diffuse/specular reflection - Video

Catalog: 
6A10.20
Location: 
3_1
Video Encyclopedia :Show a beam of light reflecting off a mirror on an optics board. Replace the mirror with a sheet of paper.

Periscope

demonstration image
Catalog: 
6A70.193
Location: 
Fc5
A tubular optical instrument that contain reflecting elements, such as mirrors and prisms, to permit observation from a position displaced from a direct line of sight.

Large concave mirror - Video

Catalog: 
6A20.31
Location: 
3_1
Video Encyclopedia :Hold a candle and other objects at the center of curvature of a large concave mirror.

Impossible triangles - Video

demonstration image
Catalog: 
6J11.50
Location: 
3_1
Video Encyclopedia :An optical illusion that depends on viewing angle.

Corner reflection - Video

Catalog: 
6A10.30
Location: 
3_1
Video Encyclopedia :Look at your image in a corner cube.

Single Slit and Laser

ASU copyright
Catalog: 
6C10.10
Location: 
Ga2
Shine a laser beam through slits of various sizes.

Disappearing eye dropper - Video

demonstration image
Catalog: 
6A40.30
Location: 
3_1
Video Encyclopedia :Place an eyedropper in a liquid with an index of refraction matched to the glass.

Polaroid's on the overhead - Video

demonstration image
Catalog: 
6H10.10 C
Location: 
3_1
Video Encyclopedia :Two polaroid sheets are partially overlapped while aligned and at 90 degrees.

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