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What it shows

A telescope (with video output) at the front of the lecture hall is focused on two point light sources at the rear of the hall. Although the light sources are only 1/2 mm apart, they are readily resolved. The Rayleigh limit of resolution can...

Demonstration Video

Audience: Instructor Student
Version: Interactive Non-Interactive

A thin wire, moving through the air, is made to vibrate in the audio range at the vortex shedding frequency.

What it Shows

When air flows around an object, there is a range of flow velocities for which a von Karman vortex street is formed. The shedding...

Water moving around a cylindrical pendulum makes the cylinder swing at the vortex shedding frequency.

What it Shows:

When fluid flows around a cylindrical object, there is a range of flow velocities for which a von Karman vortex street is formed. The...

A brownie pan with two food safe thermocouples, one in the brownie batter and one in the air next to the pan, is put in a pre-heated oven, and the temperature profiles recorded and displayed.

Clean copper wire is used to make an armature for the...

A variety of element samples to show on the first day of Gen Chem: compare metals and non-metals; solids, liquid and gas elements; compounds vs. elements.

Total internal refraction of laser beam through sugar solution with refractive index gradient; representative of seismic waves through Earth's mantle.

What it shows:

As a simulation of atmospheric refraction, this demonstration shows the gradual and...

What It Shows

As shown in the drawing, the Mercator projection is a cylindrical map projection of the spherical globe. The meridians and parallels of latitude on the globe end up appearing as lines crossing at right angles in the projection. Areas on the...

What it shows:

The strength of a material in tension or compression will be affected by discontinuities in its surface structure. This can be demonstrated for glass using microscope slides, and the comparison of failure stress before and after the removal...

What it shows:

A supersaturated solution is unstable, and by seeding it you can trigger rapid crystallization.

How it works:

Sodium acetate can dissolve in water in great quantities at high temperature, and if you let the solution cool carefully to around...