# Geometrical Optics

## L6-34: OPTICAL BOARD - CHROMATIC ABERRATION IN LENS

Category: L6 Lenses
Purpose: Show chromatic aberration in a convex lens.

## L6-33: STRING MODEL - CHROMATIC ABERRATION

Category: L6 Lenses
Purpose: Ilustrate rays for chromatic aberration.

## L6-32: OPTICAL BOARD - SPHERICAL ABERRATION IN LENS

Category: L6 Lenses
Purpose: Demonstrate spherical aberration using rays.

## L6-31: STRING MODEL - SPHERICAL ABERRATION

Category: L6 Lenses
Purpose: Illustrate light rays for spherical aberration.

## L6-22: OPTICAL BOARD - RAY DIAGRAM - VIRTUAL IMAGE NEG LENS

Category: L6 Lenses
Purpose: Use the three principal rays to locate the virtual image of a diverging lens.

## L6-21: OPTICAL BOARD - DIVERGING SPHERICAL LENS

Category: L6 Lenses
Purpose: Determine the focal point of a concave lens.

## L6-14: IMAGE OF CONVEX LENS - WITH AND WITHOUT BAFFLE

Category: L6 Lenses
Purpose: Encourage thought regarding how an image is formed.

## L6-13: OPTICAL BOARD - PARALLEL RAY FOCUS

Category: L6 Lenses
Purpose: Demonstrate focusing of parallel rays in a counterintuitive way.

## L6-11: OPTICAL BOARD - DEPTH OF FIELD

Category: L6 Lenses
Purpose: Illustrate the idea of depth of field of a (camera) lens, and to locate the near and far points.

## L6-09: REAL IMAGE OF CONVERGING LENS

Category: L6 Lenses
Purpose: Show the systematics of real image formation by a converging lens.

## L6-08: REAL IMAGE OF CONVERGING LENS - LIGHT BULB

Category: L6 Lenses
Purpose: Show the real image of a converging lens.

## L6-07: MICROWAVES - LENS

Category: L6 Lenses
Purpose: Demonstrate that a paraffin lens can focus microwaves.

## L6-06: MULTIPLE PINHOLES AND LENS RECOMBINATION

Category: L6 Lenses
Purpose: Demonstrate that a lens focuses light.

## L6-05: OPTICAL BOARD - RAY DIAGRAM - VIRTUAL IMAGE POS LENS

Category: L6 Lenses
Purpose: Use principal rays to locate a virtual image produced by a convex lens.

## L6-04: OPTICAL BOARD - RAY DIAGRAM - REAL IMAGE POS LENS

Category: L6 Lenses
Purpose: Use principal rays to locate a real image produced by a convex lens.

## L6-03: OPTICAL BOARD - HYPERBOLIC LENS

Category: L6 Lenses
Purpose: Show focusing of a hyperbolic lens.

## L6-02: OPTICAL BOARD - CIRCULAR SLAB

Category: L6 Lenses
Purpose: Show focusing of a circular lens.

## L6-01: OPTICAL BOARD - CONVERGING SPHERICAL LENS

Category: L6 Lenses
Purpose: Show focusing of a spherical (cylindrical) convex lens.

## L5-34: FRUSTRATED TOTAL INTERNAL REFLECTION - MICROWAVES

Purpose: Demonstrate frustrated total internal reflection using microwaves.

## L5-24: FIBER OPTICS COMMUNICATION LINE

Purpose: Demonstrate transmission of laser light by a real fiber optics communication line.
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• #### 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