## Bose-Einstein Condensation

### Evaporative Cooling

See how evaporative cooling works, both in your coffee cup and in Bose-Einstein Condensation.

### Laser Cooling

Another piece from the Bose-Einstein Condensation pages. See how lasers can be used to "cool" matter by slowing down atoms. In three parts.

### Optical Molasses

A demonstration of how multiple laser beams can be used to actually cool and confine atoms.

## Microwave Ovens

### Water in a Microwave

This applet demonstrates how a microwave field makes a water molecule oscillate back and forth, leading to heating in food.

### Cooking "Nodes" in a Microwave Oven

Try "nuking" some marshmallows in a microwave oven and see how they cook at different rates in different parts of the oven.

### Dipole Molecule in a Changing Field

See conceptually how the electromagnetic field of one charge will move a dipole molecule (water) around like a compass needle.

## The Two-Slit Experiment

### Young's Two Slit Experiment

Play with the classic "two slit" experiment using lasers to show interference patterns.

### Feynman's Two Slit Experiment

In this one, shoot a stream of electrons through the two slits and see how the interference patterns still appear. How bizarre, how bizarre.

### Wave Interference

Stretch and shift two waves and see how they add together to interfere both constructively and destructively.

## X-rays and CAT Scans

### Fluoroscope

Amaze your friends! A fun demonstration of what it looks like to "see" in the x-ray portion of the spectrum.

### X-Ray Emissions

See how tungsten atoms are used to produce x-rays using both "Bremsstrahlung" and "K-Shell Knockout".

### Schrödinger & Bohr Atomic Models

A side-by-side comparison of the Schrödinger and Bohr models of the hydrogen atom and how it absorbs and emits photons.

## Electromagnetic Waves and Particles

### Orbits

Place negatively charged particles around a positively charged nucleus and see how the particles "fall" into stable orbits. Also demonstrates gravitational orbits.

### Fieldwaves

"Particle on a Spring" shows how an oscillating charge propagates a wave through a single "line" of a field.

### Force Field

Put down "test charges" in an electromagnetic field to see how the pattern of the field appears.

### Interactive Force Field

In this version you can add, modify, and drag the charges that create the field to see how the test charges are affected.

## Lasers

### Photons

Please send all correspondence concerning applets to David Rea at the Physics 2000 project.