Revised Fri Aug 12 10:19:21 2011
EM-a1a | Frictional Electricity | An electroscope is charged using charged rods. |
EM-a2c | Party balloon on wall | Rub a balloon against your hair or wool shirt and stick it on the wall. |
EM-a2e | Paper pickup with charged objects | Use a comb, PVC rod, glass rod, or other charged object to pick up pieces of paper |
EM-a2a | Charged Rods on Pivots | A charged rod on a pivot is used to show attraction and repulsion by another charged rod. |
EM-a3a | Conductors and Insulators | Shows that charge can be transferred to an electroscope through conductors but not insulators |
EM-a4a | Electroscope Charged by Induction | Charge an electroscope by induction. |
EM-a4b | Charged Rods and Aluminum Can | A charged rod can be used to pull a soda can by electrostatic induction |
EM-a5a | Wimshurst Machine | Generate sparks with a Wimshurst Machine, and explain its workings. |
EM-a5b | Van de Graaff Generator | Describe the operation of the Van de Graaff and show sparks from the ball to a nearby grounded conductor. |
EM-b1m | Van de Graaff stick | Aluminum floaters are held aloft with the Fun Fly Stick |
EM-a2d | Large Sphere and Ping Pong Ball | A small charged ball is repelled from a large charged sphere. Attraction and induction can also be shown. |
EM-a5c | Van de Graaff Generator--Sound | The engine strains more and more as the charge on the dome increases. |
EM-b1c | Styrofoam Peanut Blowout | Styrofoam peanuts in a box on top of the Van de Graaff fly out. |
EM-b1e | Tart Pan Blowoff | Tart pans stacked on top of the Van de Graaff fly off. |
EM-b1f | Ball Charge Transfer | A conductive ball bounces between electrically charged vertical plates |
EM-b1i | Franklin's Bells | A conductive ball bounces between electrically charged bells |
EM-b1b | Hair on End | Charge yourself with a Van de Graaff generator |
EM-b1d | Electric Field Visualizer | Tiny fibers in a clear oil align in the direction of strong applied electric fields. |
EM-b1k | Visualizing Field Lines in a Capacitor | Use the Electric Field Visualizer with two parallel conductors to show the field lines for a capacitor including edge effects |
EM-b1a | Oscilloscope | Show that an electron beam passing between charged, parallel plates is deflected using an oscilloscope (view along beam) |
EM-b3g | Lightning Rod | Electrical arcing between two large metal spheres abruptly ceases when the lightning rod is touched to one. |
EM-b3f | Electric Wind with Van de Graaff | A point attached to the Van de Graaff blows a hanging piece of cardboard. |
EM-b3e | Van de Graaff Pinwheel | A pinwheel rotates on top of a van de Graaff generator. |
EM-b4a | Electron Beam Deflection -- Parallel Plates | An electron beam is deflected between parallel, oppositely charged plates (viewing beam from side) |
EM-d4a | Jacob's Ladder | An arc rises between rabbit ear electrodes attached to a high voltage source. |
EM-b1g | Torque on Electric Dipole | A small rod aligns between parallel plates |
EM-b2a | Faraday Bucket | Show that charge resides on the outside of a hollow conductor. |
EM-b2f | Gauss with Electric Field Visualizer | Tiny fibers in a clear oil that align in the direction of strong applied electric fields remain randomly oriented inside a charged ring. |
EM-b2b | Radio in a Cage | Surround a radio by a Faraday cage and the signal goes away |
EM-b1n | Visualizing Electric Potential | A voltmeter is used to probe the electric potential between conductors in a water solution. |
EM-b3a | Surface charge density - conducting balls | A pair of large balls with the same separation as a pair of small balls are charged simultaneously with the Wimhurst. |
EM-b3b | Electric Potential -- Parallel Plates | Show that the electric potential varies linearly with distance between Parallel Plates |
EM-b3c | Charged Ovoid | Use a proof plane and an electroscope to compare charge densities at different points on an egg-shaped conductor. |
EM-c3b | Bulb and 1 Farad Capacitor | A large (1 Farad) capacitor is charged with a battery then discharged through a light bulb. |
EM-c1a | Parallel Plate Capacitor | Vary the spacing of a parallel plate capacitor attached to an electroscope. |
EM-c1b | Rotary Plate Capacitor | The rotary plate capacitor is attached to the electroscope. |
EM-f3e | Capacitors in Series and Parallel | Discharge a 0.1F capacitor through a light bulb, and compare with that for three in series and three in parallel |
H-d4b | Dust Explosion | Corn starch dust blown into a flame catches on fire. |
EM-c3a | Explosive Capacitor Discharge | Discharge a 10kV, 1uF capacitor through a thin wire or thick screwdriver |
EM-c2a | Parallel Plate Capacitor with Dielectric | Insert and remove a dielectric sheet from a charged parallel plate capacitor attached to an electroscope. |
EM-c2c | Force on a dielectric | Mineral oil climbs in the gap between parallel plates |
EM-c2b | Dissectable Capacitor | This curious capacitor is charged, disassembled, passed around, assembled, and discharged with a spark. |
EM-d1a | Wire Resistivity | Place 6V across a set of wires of different diameters and measure the currents. |
EM-d2a | Change of Resistance with Temperature | A coil in series with a lamp is immersed in liquid nitrogen making the lamp glow brighter. |
EM-d2c | Conduction in Glass | Heat a glass rod with a flame until its resistance is low enough to sustain conduction. |
EM-f1a | Resistor I-V characteristics | Measure and graph the I-V characteristics for a resistor. The value of the resistance may be varied. |
EM-f1b | Resistance of a Wire | Measure the potential drop along a wire |
EM-f1e | Hot Dog Cooker | Spike a hot dog with two nails and cook it. |
EM-f2a | Series Circuit with Bulbs | Show a series circuit of light bulbs |
EM-f2b | Parallel Circuit with Bulbs | Show a parallel circuit of light bulbs |
EM-f2c | Series Parallel Combination | Two bulbs in series with a power supply, and a third bulb in parallel with one of others. |
EM-e4b | Internal Resistance of Battery | Measure the voltage across a battery as its load decreases |
EM-c3d | Bulb and 1 Farad Capacitor with Oscilloscope | A large (1 Farad) capacitor is charged with a battery then discharged through a light bulb, with output monitored with an oscilloscope. |
EM-f3d | Bulb, 1 Farad Capacitor, and oscilloscope | Oscilloscope display of a 1 Farad capacitor discharging through a light bulb. |
EM-h2a | Magnets on Pivots | One magnet is placed on a pivot. The other is used to attract or repel the first |
EM-h2b | Ring Magnets on a Pole | Two or more ring magnets are placed on a vertical pole |
EM-h1j | Magnet and Iron Filings Panel - 2D visualization | Iron filings in a viscous liquid sandwiched between plastic sheets show the path of magnetic field lines. Suitable to pass around |
EM-h1e | Magnet and Iron Filings -- 3D | A bar magnet surrounded in 3D by a clear acrylic tank filled with a liquid containing iron filings. |
EM-h3a | e/m tube | Deflect the beam in an e/m tube with magnets |
EM-h3b | Oscilloscope and magnet | Deflect the beam in an oscilloscope with magnets |
EM-h4c | AC and DC Lamps | A magnet is brought near two carbon filament bulbs, one DC powered and one AC powered. |
EM-h4b | Force on Current-carrying wire | A loop of wire swings to the side of a U-magnet's gap when connected to a current-limited power supply. |
EM-h4d | Rail Gun -- External Magnet | A wheel and axle accelerate along two electrified rails over strong rare-earth magnets |
EM-h5a | Galvanometer | A magnet exerts a torque on a current-carrying coil. |
EM-k4c | Direct Current Motor | Show and explain a DC motor running on batteries. |
EM-k4g | World's Simplest Motor | A simple DC motor that requires only a battery, a bare wire, a nail, and a magnet. |
EM-h2c | magnetic dipole in external magnetic field | Shows that a magnet is rotated but not displaced by a uniform B field, and displaced, but not rotated, by a grad B field where B itself is zero. |
EM-h1a | Oersted Experiment on Overhead | Show that current in a wire deflects a compass needle. |
EM-h1k | B-Field due to long straight wire | Iron filings are sprinkled on a plexiglas plate through which a long vertical current-carrying wire passes. |
EM-h1m | B-Field due to single coil. | Iron filings are sprinkled on a plexiglas plate through which a single loop of current-carrying wire is mounted |
EM-h1d | Magnet and Compass Array -- 2D | A small magnet on top of the magnetic domain model apparatus |
EM-h4a | Force Between Two Current Carrying Conductors | Show on the overhead projector that long parallel wires with currents in the same (opposite) directions attract (repel). |
EM-h1n | B-Field due to solenoid | Iron filings are sprinkled on a plexiglas plate through which a current-carrying solenoid is mounted. |
EM-k1a | Induction Coil and Magnet | A magnet is moved in and out of a coil connected to a galvanometer |
EM-k1b | Induction with Coils and Battery | Attach one coil to a galvanometer, another to a battery and tap switch. Use a core to increase coupling |
EM-k2a | Eddy Current Pendulum | A copper sheet, a comb, a ring, and a broken ring are swung through a large electromagnet. |
EM-k2b | Magnets and Eddy Tubes | Drop magnet and a non-magnetic dummy down an aluminum tube. |
EM-k2c | Magnet and Copper Tube | Drop magnet down a short length of straight copper tubing and watch it fall. |
EM-k2g | Induction Flashlight | This flashlight runs on induction-induced currents, a capacitor, and an LED lightbulb. |
EM-k2d | Jumping Rings | A solid conducting ring sitting on a vertical solenoid jumps and a split ring doesn't |
EM-j1b | Back EMF with light bulb | A light bulb in parallel with an inductor flashes when its power is disconnected. |
EM-j1c | Inductance Spark -- classroom version | A bright spark is produced when an inductor is disconnected from a power supply |
EM-j2a | Series RL circuit: L/R charge/discharge | "Charging" and "Discharging" of inductor shown with square wave and oscilloscope |
EM-j2b | Series RL circuit: L/R phase shifts | Show phase shifts in a series RL circuit using the oscilloscope. |
EM-J3a | non-driven LRC circuit oscillations | Show the oscillations (ringing) when a charged capacitor is connected in series to an inductor and small resistor. |
EM-k4a | AC Generator | Rotating a wire loop in a magnetic field generates an AC current in the loop. |
EM-k4b | DC Generator | Generate a DC current by rotating a loop with a split-ring connection in a magnetic field. |
EM-k4d | Hand-held DC Generator | Use the handheld generator to illuminate a bulb. |
EM-L2a | 60 Hz LRC circuit | Shows the potential difference across the Capacitor and Inductor at resonance. |
EM-L2b | LRC circuit with function generator | Show the relative phases and amplitudes for the potential differences across the components of an driven LRC circuit. |
EM-L2d | RC Circuit -- Phase relations | Show the potential difference across the power supply, the resistor, and the capacitor as a function of frequency, resistance, or capacitance. |
EM-L2e | RL Circuit -- Phase relations | Show the potential difference across the power supply, the resistor, and the inductor as a function of frequency, resistance, or inductance. |
EM-L2f | driven LRC circuit at resonance | Compare the aplitudes of the power supply voltage to the voltage over the capacitor at resonance. Note the phase shift. |
EM-k3b | Dissectable Transformer | Light a bulb and show voltage relationships with various coil and frequency combinations. |
EM-k3a | Transformer | Demonstrate step-up and step-down transformers. |
EM-g1a | Lodestone | Show that the lodestone attracts small nails and paperclips. |
EM-h1c | Dip Needle | A dip needle is used to show the inclination of the earth's field. |
EM-g3c | Diamagnetic Glass | A small glass rod suspended by a thread in the gap of a powerful magnet orients transverse to the magnetic field. |
EM-g3e | Floating Diamagnetic Graphite | A piece of diamagnetic graphite floating on water is pushed around by a magnet. |
EM-g3d | Diamagnetic Levitator | A small magnet is suspended in mid-air between two diamagnetic graphite disks. |
EM-g1b | Steel Bar and Magnet Puzzle | Given only a cylindrical magnet and a similarly shaped steel bar, figure out which is which! |
EM-g2c | The Barkhausen Effect | Clicking noises are heard when a magnet is brought near iron wire within a pickup coil. |
EM-g2d | Magnetic Domains in Ferrimagnetic Garnet | Watch a ferri-optical garnet between crossed Polaroids on a microscope as a magnet is brought near. |
EM-g2a | Magnetic Domain Model | An array of small compasses shows domain structures |
EM-g5a | Meissner Effect | Cool a superconductor and it will levitate and float a magnet. |
EM-g5b | Hopkins Superconducting Model Maglev Train | A model train with with two superconducting disks cooled by LN2 glides over a track of powerful magnets |
EM-g3b | Paramagnetic Aluminum | A small aluminum rod suspended by a thread in the gap of a powerful magnet aligns with the field. |
EM-g3a | Paramagnetic Liquid Oxygen | Liquid oxygen condensing from air drips into the gap of a strong magnet |
O-a1b | Speed of light in fiber optic cable | Compare the time for a light pulse to travel through two different lengths of fiber optic cable. |
O-a1a | Light Bulb in Vacuum | Show a buzzer and light bulb in vacuum |
EM-n1b | Microwave Generation and Detection | Show the generation and detection of microwaves including polarization |
EM-n2a | Tesla Coil | Light a fluorescent lamp by holding it near a Tesla Coil |
EM-n2c | Large Tesla Coil | Light a fluorescent lamp by holding it near a Tesla Coil |
O-h1a | Polaroids on the Overhead | Show polarization with two or three sheets of polaroid on the overhead |
O-h1d | Vanishing Wall | Put your hand through a "wall" created by a trick of polarization. |
O-h1b | Microwave Polarizing Filter | Insert a grid of parallel wires (= cookie cooling rack) in a microwave beam and rotate the grid. |
O-h3a | Karo Syrup | Insert a beaker of liquid sugar between crossed polaroids. |
O-h3p | Calcite Crystals | Use a polaroid filter to show the polarization of ordinary and extraordinary rays |
O-h3q | Demonstrating Strain with Crossed Polaroids | A set of lucite shapes are stressed between crossed polaroids |
O-h5a | Polarization in the Sunset Demo | Rotate a Polaroid at the side of the tank in the sunset demo. |
EM-n3b | Project the Spectrum | Project white light through a high-dispersion prism |
O-a4a | Magic Mending Solution | A broken pyrex beaker is "magically" mended with a beaker of Wesson Oil. |
O-a4d | Refraction with Blackboard Optics | A single beam of light shines on a large acrylic surface. |
O-a4j | Stick in Water | A stick appears bent when inserted into the water at an angle. |
O-a4s | Total Internal Reflection (Blackboard Optics) | Show total internal reflection with the blackboard optics kit. |
O-a4p | Total Internal Reflection-Fiber Optics | Shows the path of a laser beam inside an acrylic rod. |
O-h2b | Reflection off Water | Reflected light is shown to be polarized. |
O-a1c | Blackboard Optics -- Plane Mirror | Use multiple-beam generator to show image formation with a plane mirror. |
O-a1d | Corner Reflector | Look into a corner reflector |
O-a1e | Multiple Virtual Images | By folding two mirrors hinged together, show multiple virtual images of a candle. |
O-a2c | Blackboard optics -- curved mirrors | Show image formation (size, location, orientation) from concave and convex mirrors on the blackboard. |
O-a2d | Optic Mirage | Two concave mirrors face each other. The top mirror has a hole allowing light to enter and escape. An image of the objects resting on the bottom of one appears at the center hole of the top mirror. |
O-a2e | Large Concave/Convex Mirrors | Shake hands with yourself using the large concave mirror; view images in the large convex mirror. |
O-a6a | Blackboard Optics -- Thin Lens | Ray trace images using convex and concave lens and a parallel ray box. |
O-a6b | Image formation with Thin Lens | Project or view the image of an illuminated arrow through a thin lens. |
O-j1c | Working Eye Model | A model demonstrates the focal capabilities of the normal, nearsighted, and farsighted eye. |
O-j1e | Eye Model (Blackboard Optics) | Show normal, nearsighted, and farsighted blackboard optics eye models, and correct with additional lenses. |
O-a6c | Magnifying Glass with Eye Model | Use the Working Eye Model to show a magnifying glass enlarging an object's image and allowing the near point to move closer to the eye. Greater magnifications can be achieved with stronger magnifiers. |
O-a7a | Microscope Model (Blackboard Optics) | Mimic a microscope objective with blackboard optics. |
O-a7e | Two-Lens Microscope Model | Use two lens to make a simple compound microscope. |
O-a7d | Celestron Telescope | Show and tell the Celestron C90 telescope with Maksutov-Cassegrain optics, 90 mm aperature, 1 m focal length, and f/11 focal ratio. |
O-d4a | Michaelson Interferometer | Show the Michaelson Interferometer and how it works. |
O-d4b | Michelson Interferometer and soldering iron | Produce an interferogram of turbulant air with a soldering iron in the optical path of the Michaelson interferometer. |
W-b5a | Single Slit in Ripple Tank | Diffraction from a plane wave passing through a single slit on the ripple tank mounted on the overhead projector. |
O-c1a | Single Slit Diffraction Pattern - Cornell Slits | Shine a laser beam through single slits of various widths. The Cornell slitfilm is shown; we also have a slitfilm from Pasco |
O-c1b | Microwave Diffraction - Single Slit | The diffraction pattern of a single slit can be heard with the audio-coupled detector |
W-b5d | Double Slits in Ripple Tank | A plane wave impinges on a barrier with two slits in the ripple tank on the overhead projector. |
O-d1a | Double Slit and Laser - Cornell Slitfilm | Use a laser bean on the slits on the far column of the Cornell slitfilm to show the effect of increasing the spacing between a pair of slits, with the slit spacing held constant. The first entry is a single slit. |
O-d3a | Newton's Rings | Reflect white light off Newton's Rings onto a screen. |
O-d3d | Air Wedge | Two microscope slides on top of one another produce interference fringes between them. |
O-d3b | Soap Film -- 2 Litre Bottle | View the interference fringes of a soap film in a 2-litre bottle. |
O-c2a | Arago's (or Poisson's) Spot | The diffraction pattern from a laser beam shining on a small ball has a bright dot in the center of the shadow of the ball. |
O-c2e | Pin hole diffraction - projected | View the diffraction pattern of a pinhole; a variety of pinhole dimensions are available. The photo shows 100 um and 50 um round pinhole patterns and 100 um and 50 um square patterns. |
O-d2a | Number of Slits | Shine a laser beam through various numbers of slits with the same spacing and width |
O-d2c | Types of Diffraction Gratings | Transmission and Reflection, Blazed and Not, Diffraction Gratings of different line densities probed by a laser. |
MO-b1a | Diffraction Grating and Atomic Spectra | Have students look through a diffraction grating at a spectrum tube. |
O-d2h | Diffraction from DVDs | Light is diffracted from a CD and DVD |
O-d2e | 2D Diffraction - Pasco Patterns | Show diffraction patterns from two 2D patterns, one square in symmetry and one hexagonal. |
O-d2d | 2D Diffraction - Optical Transform Kit | Diffract laser light with this set of 32 patterns, mostly of 2-D lattices with various symmetries and lattice bases, available from http://ice.chem.wisc.edu |
O-d2f | 2D Diffraction - DNA Optical Transform | Use this set of 12 grating patterns with a laser to teach the diffraction of DNA (slide also available from http://ice.chem.wisc.edu) |
MO-a1a | Photoelectric Effect in Zinc | A charged electroscope attached to a zinc plate discharges when UV light illuminates the zinc. |
MO-a6a | Electron Diffraction | Electrons passing through a carbon target produce a circular diffraction pattern. |
MO-a5d | Vibrating Circular Wire | A circular wire driven by a function generator produces standing waves at resonant frequencies. |
EM-h2d | Precessing Magnetic Dipole | A magnetic dipole floating in an air bearing precesses in a uniform B field. |
EM-h2e | Classical Magnetic Resonance | Rotate a transverse magnetic field to "flip" the spin of a precessing magnetic dipole. |
O-p6a | HeNe Laser exposed | Examine an exposed operating HeNe laser cavity with a diffraction grating. |
EM-L3a | Bridge Rectifier with LEDs | Operate a bridge rectifier with LEDs at low frequency |
EM-m1a | Diode I-V characteristics | Circuit for measuring the I-V characteristics of a diode |
MO-d1b | Geiger Counter and Samples | Listen to the counts from a Geiger Counter brought near to a radioactive sample. |
MO-d3a | Diffusion Cloud Chamber | A diffusion cloud chamber shows the tracks from cosmic rays and from alpha, beta, gamma, and X-ray sources. |