# Geometrical Optics

## L3-18: FOCUSING OF HEAT WAVES - OVERHEAD PROJECTOR

Category: L3 Curved Mirrors
Purpose: Illustrate focusing of heat in a very dramatic way.

## L3-13: OPTICAL BOARD - SPHERICAL ABERRATION IN CONCAVE MIRROR

Category: L3 Curved Mirrors
Purpose: Show spherical aberration in a spherical mirror.

## L3-12: OPTICAL BOARD - RAY DIAGRAM - CONCAVE MIRROR

Category: L3 Curved Mirrors
Purpose: Locate the image of a concave mirror by using the three principal rays.

## L3-11: OPTICAL BOARD - CONCAVE SPHERICAL MIRROR

Category: L3 Curved Mirrors
Purpose: Illustrate reflection from a concave spherical mirror.

## L3-02: OPTICAL BOARD - RAY DIAGRAM - CONVEX MIRROR

Category: L3 Curved Mirrors
Purpose: Determine the image position for an object in front of a convex mirror using the three principal rays.

## L3-01: OPTICAL BOARD - CONVEX SPHERICAL MIRROR

Category: L3 Curved Mirrors
Purpose: Show reflection of light rays from a convex mirror.

## E2-42: TELESCOPE MODEL

Category: E2 Astronomy
Purpose: Show how a telescope can view any point in the sky using a universal mount.

## E2-24: UMBRA AND PENUMBRA - COLOR FILTERS

Category: E2 Astronomy
Purpose: Identify the source of penumbra regions.

## E2-23: UMBRA AND PENUMBRA - EXTENDED SOURCE

Category: E2 Astronomy
Purpose: Show umbra and penumbra with an extended source, as in an eclipse.

## E2-02: MEASUREMENT OF RADIUS OF EARTH

Category: E2 Astronomy
Purpose: Demonstrate how the radius of the earth can be measured using trigonometry.

## L2-42: CORNER REFLECTOR - MIRROR TILES

Category: L2 Plane Mirrors
Purpose: Show what a corner reflector does

## L2-63: TELEIDOSCOPE

Category: L2 Plane Mirrors
Purpose: Demonstrate a kaleidoscope with rotating mirrors.

## L2-62: MULTIPLE REFLECTIONS WITH MIRROR TILES

Category: L2 Plane Mirrors
Purpose: Show multiple reflections in a three-dimensional system of mirrors.

## L2-46: CORNER REFLECTOR - MODELS

Category: L2 Plane Mirrors
Purpose: Model how the rays reflect in a corner reflector.

## L2-45: MICROWAVES - CORNER REFLECTOR

Category: L2 Plane Mirrors
Purpose: A two-dimensional microwave corner reflector.

## L2-44: CORNER REFLECTOR - HAND HELD

Category: L2 Plane Mirrors
Purpose: Demonstrate dramatically how a corner reflector works.

## L2-43: CORNER REFLECTOR - ROTATING

Category: L2 Plane Mirrors
Purpose: Show that the reflected ray from a corner reflector is parallel to the incoming ray.

## L2-41: OPTICAL BOARD - CORNER REFLECTOR

Category: L2 Plane Mirrors
Purpose: Show how a corner reflector works in two dimensions.

## L2-25: LIGHT BULB IN WATER

Category: L2 Plane Mirrors
Purpose: Do a magic trick using partially reflected light.

## L2-22: INFINITY MIRROR

Category: L2 Plane Mirrors
Purpose: Illusion with half-silvered mirror.
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• #### O1-01: EYE MODEL - OPTICS

Demonstrate the optics of the eye and corrections of optical defects. Read More
• #### O1-02: EYE OPTICS MODEL - INDIVIDUAL VIEWING

Show inversion of the image on the retina by the eyelens. Read More
• #### O1-03: IMAGE INVERSION ON RETINA

Model image inversion on the retina. Read More
• #### O1-04: IMAGE INVERSION ON RETINA - INDIVIDUAL VIEWING

Individual demonstration of image inversion on retina. Read More

• #### O1-11: TEST OF NEARSIGHTEDNESS VS. FARSIGHTEDNESS

Identify nearsighted and farsighted eyes using laser speckle. Read More

• #### O1-22: SPHERICAL ABERRATION IN EYE USING PINHOLE

Show spherical aberration in eye and its correction. Read More