6A Geometrical Optics

Energy at a focal point - Video

demonstration image
Catalog: 
6A20.60A
Location: 
3_1
Video Encyclopedia :Remove the projection head of an overhead projector and hold a piece of paper at the focal point until it bursts into flame.

Mirror box - Video

Catalog: 
6A10.65
Location: 
3_1
Video Encyclopedia :Two people look into opposite ends of a box containing a half silvered mirror in the center. As the light on one end is dimmed, the light on the other brightens, causing metamorphosis.

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.

Concave and convex mirrors - Video

Catalog: 
6A20.10C
Location: 
3_1
Video Encyclopedia :Shine parallel beams at convex and concave mirrors. Use thread screen for display.

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.

Spherical aberration in a mirror - Video

Catalog: 
6A20.20
Location: 
3_1
Video Encyclopedia :Shine parallel rays at spherical and parabolic mirror elements, noting the difference in aberration.

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.

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.

Light Pipes - Video

demonstration image
Catalog: 
6A44.40C
Location: 
3_1
Video Encyclopedia :Shine a laser into a curved plastic rod.

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.

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