# Geometrical Optics

## 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.

## L2-21: OPTICAL BOARD - HALF-SILVERED MIRROR

Category: L2 Plane Mirrors
Purpose: Illustrate a half-silvered mirror.
Page 6 of 10
• #### H2-01: FOCUSING OF SOUND WITH CONCAVE REFLECTORS

Demonstrate how sound waves can be focused by concave reflectors. Read More
• #### H2-02: PARABOLIC MICROPHONE

Show what a parabolic microphone is and to demonstrate its sensitivity individually. Read More

• #### H2-11: SOUND LENS

Demonstrate focusing of sound by refraction in a sound lens Read More
• #### H2-21 AUDIBLE YOUNG'S EXPERIMENT - GROUP LISTENING

Demonstrates interference of sound waves with two coherent sources Read More
• #### H2-22: INTERFERENCE - TRANSPARENCIES

An optical analog to the interference pattern from two identical sound sources. Read More
• #### H2-24: AUDIBLE YOUNG'S EXPERIMENT - MIC AND SCOPE

Demonstrate interference of sound with two coherent sound sources in a quantitative way. Read More
• #### H2-25: QUINCKE'S INTERFERENCE TUBES

Demonstrate interference of sound waves in a perhaps surprising way. Read More
• #### H2-26: PHASE REVERSAL BETWEEN STEREO SPEAKERS - MUSIC

Demonstrate interference of sound in a dramatic way. Read More
• #### H2-27: PHASE REVERSAL BETWEEN STEREO SPEAKERS - OSCILLATOR

Dramatically demonstrate interference between two identical sources. Read More
• #### H2-28: FOURIER SYNTHESIZER - ADDITION OF WAVES

Demonstrate addition of two sine waves with variable phase difference. Read More
• #### H2-31: ACOUSTIC COLLIMATOR

Demonstrate the effect of frequency on diffraction of sound. Read More
• #### H2-32: SPEAKER WITH BAFFLE

Demonstrates diffraction and interference of sound waves Read More
• #### H2-33: SPEAKER AND EXPONENTIAL HORN

Demonstrate the effect of an exponential horn enclosure. Read More

• #### H2-51 BEATS - AUDIO OSCILLATORS, SPEAKER & OSCILLOSCOPE

Hear audio beats and see their wave forms on an oscilloscope Read More
• #### H2-52: BEATS AND RESONANCE - TUNING BARS

Demonstrate beats, and to demonstrate resonance between two identical tuning bar resonators. Read More