really silly question

[WiNgNuTz]

Think about an ambulance coming towards you with its sirens on, then the sound changes as it passes you.

When its approaching you, the waves are squashed together, the wavelength is shorter, making the frequency higher.

As it passes you and moves away, the waves are more spread out, making the frequency lower

Java thingy!

http://www.colorado.edu/physics/2000/app...ppler.html

I got that bit, I remember that from school, and often recall it as an ambulance or similar shoot past, but I didnt realise the same theory applied to light!

Also, surely you'd need more of a 60mm drop to achieve 40% of the speed of light?