# Geometrical Optics

## L2-07: PERVERTED IMAGE - LIGHT

Category: L2 Plane Mirrors
Purpose: Demonstrate that a plane mirror does not produce a left-to-right inversion.

## L2-04: VIRTUAL IMAGE DETECTOR - PLANE MIRROR

Category: L2 Plane Mirrors
Purpose: Show the nature of a virtual image.

## L2-03: MICROWAVES - REFLECTION

Category: L2 Plane Mirrors
Purpose: Demonstrate that microwaves undergo specular reflection.

## L2-02: OPTICAL BOARD - RAY DIAGRAM - PLANE MIRROR

Category: L2 Plane Mirrors
Purpose: Demonstrate how several light rays are used to locate the image in a plane mirror.

## L1-33: LASER BEAM EXPANDERS

Purpose: Expand a laser beam to uniform 10mm or 40mm diameter.

## L1-23: PINHOLE VIDEO CAMERA

Purpose: Produce video images with a pinhole camera.

## L1-22: OPTICAL BOARD - PINHOLE CAMERA

Purpose: Demonstrate how a pinhole "image" is formed.

## L1-21: PINHOLE IMAGE - GROUND GLASS SCREEN

Purpose: View individually a pinhole "image."

## L1-12: INVERSE SQUARE LAW - OVERHEAD PROJECTOR AND TWO-METER STICK

Purpose: Show that light obeys the inverse square law.

## L1-11: INVERSE SQUARE LAW - LIGHT BULB AND RADIOMETER

Purpose: Demonstrate that light obeys the inverse square law.

## L1-02: TUNGSTEN-HALOGEN LAMP - PROJECTION OF LAMP

Purpose: View an operating tungsten-halogen lamp.

## L1-01: ARC LAMP - PROJECTION OF ARC

Purpose: Direct projection of side view of the arc of a carbon arc lamp.

## N1-61: REFRACTION OF LIGHT IN DIAMOND

Purpose: Show how a diamond produces colors from white light.

## N1-45: RAINBOW - WATER FLASK

Purpose: Demonstrate a large angle rainbow.

## N1-43: RAINBOW - GLASS BEAD MODEL

Purpose: Observe an almost complete circular rainbow formed by glass beads.

## N1-42: RAINDROP MECHANICAL MODEL

Purpose: Illustrate rays in formation of a rainbow.

## N1-41: RAINDROP RAY MODEL

Purpose: Illustrate formation of a rainbow.

## N1-32: ICE CRYSTALS - PAPER MODELS

Purpose: Illustrates how two types of ice crystals formed high in the atmosphere float downward through the air with preferred orientations.

## N1-23: FINE RESOLUTION OF SPECTRUM USING TWO PRISMS

Purpose: Increase the dispersion in a white light spectrum by adding a second prism.

## N1-22: OPTICAL BOARD - PRISMS - SEPARATE AND RECOMBINE

Purpose: Separate white light into its component colors with a prism and use an identical prism to recombine the light.
Page 7 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