Movie 23 (:49)

Script : We now turn on Doppler shifting with aberration. The desert is blueshifted ahead, causing a rainbow effect. As the sky is blueshifted, it drains of visible colour. The opposite happens at the edges of the image, - the sky takes on a reddish hue and the road is drained of colour as the red desert shifts into the infra-red.

Visible light can be shifted out of visible range entirely. If we recede rapidly from an object, its light will be shifted into the infrared, producing "red-shift," an observation astronomers made showing that most galaxies in the universe are moving away from us.

But approaching, light is blueshifted, even into high frequency gamma-rays, very unhealthy for speedy travellers without shielding.

 

Comments : The black dot at the center of the central brightness is not a lack of light, but rather light shifted to higher frequencies than our eyes can detect : ultra-violet, x-rays, and even gamma-rays. To humans, an intense gamma-ray beam is as dark as a closet.