Gagra City

For example, consider a ball rolling towards a ...

Click on the picture above to blink the two ima...

Observe an Iridium Satellite Flare

(Click the image below to watch Red-Navy-time m...

Joe then hops onto the Green Navy ship Green Fl...

Day 401 - 500 Click on the graph to see what ha...

Now, watch again as I put one of the little pha...

Enhancing Strategic Discourse Systematically us...

The Luge track

Animation courtesy of The Virtual Telescope Pro...

Now, what happens if we watch the ropeover a lo...

Now, watch again as I put one of the little pha...

Now, suppose light acts like a wave instead.If ...

Measure the Earth's Radius with a Stopwatch

Copyright © Michael Richmond.This work is licen...

Here are the ships of the Red Fleetwhich happen...

All the waves we've seen so far havenot moved.W...

Shooting a hockey puck

Day 1 - 80 Click on the graph to see what happens.

I've exaggerated the actual shifts by a factor ...

slow version of animated HR diagram fast versio...

The spherical mini-waves expand outward and ove...

To make things EVEN simpler,let's assume that t...

Click on each picture to see an animated sequen...

So, let's move the student farther away.(Click ...

Look at the time between two successive peak po...

Copyright © Michael Richmond.This work is licen...

It might help to answer a few simple questions....

Deep inside some stars,the conditions --- tempe...

Since 50% of the photons from the laser will pa...

Tools: Geometry and Time

The other half of the time (25% overall), theph...

Detecting gravitational waves

So, putting it all together, if light behaves l...

What happens is that a small section of the pla...