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At a certain time of the year, at a certain time of the day, if it possibly is sunshine, the stairwell outside our lab at UL has the most beautiful little artificial rainbow.
The cause is the angle between the windows opposite the stairwell and the sun just about sneaking around the corner of the next building.

Artificial rainbow

Artificial rainbow

Even when on my way, rushing to the next lecture or meeting, this humble optical effect makes me stop and smile – or snap a photo.

Rainbow in stairwell

Rainbow in stairwell

I can imagine the fascination that for example Isaac Newton must have experienced while exploring how prisms work. White becoming all colours, and being able to manipulate the rainbow.

2 Trackbacks/Pingbacks

  1. By More Wonders of Light « Mikael Fernstrom on 30 Apr 2012 at 5:31 pm

    […] observations of light can be found here. Share this:TwitterFacebookEmailLinkedInPrintLike this:LikeBe the first to like this […]

  2. […] project demonstrations, the light fantastic stopped me in the stairwell. Last year, I saw it the 6th of March. Seeing a full spectrum slowly moving across a floor or a wall, and trying to figure out where the […]

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