Electromagnetic Waves

Faraday Rotation

[M | t+ | ★★★]
Light, passing through heavy glass, has its direction of polarization rotated slightly if a magnetic field is applied to the glass.
[In-Depth Description]

Electromagnetic Spear

[M | t | ★★]
Three dimensional model showing B-field and E-field of electromagnetic radiation.
[In-Depth Description]

Hertz Resonator

[L | t+ | ★★★★]
Production and detection of electromagnetic waves using LC oscillator; transmission and detection inductors are 1m diameter copper rings.
[In-Depth Description]

Radio Wave Properties

[L | t++ | ★★★★]
A 300 MHz signal broadcast from a half-wave dipole antenna and various receiver antennae show the orientation of E and B components of electromagnetic radiation.
[In-Depth Description]

Microwave Properties

[L | t++ | ★★★★ ]
3 GHz (10 cm wavelength) microwaves are used for the demonstration of travelling and standing waves, reflection, interference, refraction, diffraction, absorption, polarization, tunneling, and waveguides.
[In-Depth Description]

Pulse Reflections in a Coaxial Cable

[M | t+ | ★★★★]
Individual voltage pulses sent down a coaxial cable reflect differently depending on how we terminate the end of the cable.
[In-Depth Description]

Group/Phase Velocity

[M | t+ | —]
The group velocity of two harmonic waves can be shown (on an oscilloscope) to be less than or greater than the individual phase velocities.

Dipole Radiation

[L | t+ | —]
The radiation pattern from a 1/2 wave dipole antenna can be explored with a transistor radio (100 MHz, FM).

FM Standing Waves

[L | t++ | —]
Electromagnetic waves reflecting off the blackboard interfere with incoming waves to produce standing waves.

Spectrum Piano

[L | t | ★★★]
The visible part of the electromagnetic spectrum is represented by less than an octave of the keys; UV, IR, and microwaves are also indicated.
[In-Depth Description]

Contact Us

Mailing Address: Lecture Demonstration Services, Science Center, Rm B-08A, 1 Oxford Street, Cambridge, MA 02138
Campus Location: Science Center B-08A | Tel: (617) 495-5824 | Email: scidemos-at-fas.harvard.edu