Гара Якоруда

slow version of animated HR diagram fast versio...

The Luge track

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

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

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

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

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

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

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

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

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

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

Tools: Geometry and Time

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

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

Measure the Earth's Radius with a Stopwatch

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

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

Animation courtesy of The Virtual Telescope Pro...

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

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

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

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

Shooting a hockey puck

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

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

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

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

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

Detecting gravitational waves

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

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

Enhancing Strategic Discourse Systematically us...

Observe an Iridium Satellite Flare

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