See the Diffraction of Moon Light at Night

[pmehnati]

Hi
At night when you watch moon in cloudy weather you will see the diffraction of moon light around it in circle form and so the colorful circles . Please explaine me the physics of it.
Thancks.

 

[Astronuc]

It's a matter of being at the correct angle - incidence and reflection -for the moon, ring (ice crystals) and observer.

 

[ideasrule]

Does it look something like this?

http://en.wikipedia.org/wiki/Halo_(optical_phenomenon)

If so, it's not due to diffraction; it's due to refraction.

 

[pmehnati]

Thanks for your answet .It was what I want (halo)