|What causes the parallel lines of light and
shadow on the ceiling above my bedroom window, in
the morning when the curtains are still
The lines extend beyond the ends of
the window, and are very numerous and of varying
in width and grayness. Covering any area of the
window merely reduces the intensity overall.
Do you have blinds behind your curtains??? Or a
fence outside, between your window and the morning
sun? Parallel lines of light and shadow must be
caused by some linear feature in your environment,
between your window and the rising sun. Look
around for anything like blinds, a fence, or even
long eucalyptus or willow leaves through which the
sun may be coming, that create this interesting
Artists sometimes use shadow striping
to create interesting effects in their paintings
and photographs. Once you have found the source of
your shadows,you can try making other shadow
shapes, and painting or photographing the
Very cool - you have discovered the
marriage between physics and art!
I don't know the answer to your question, but I'm
impressed with your experimental observations.
What happens when you open the curtains just
a little, and then a little more?Are the stripes
going in the same direction as the curtains or
crosswise? How many stripes are there, compared
with how many folds there are in the curtains?
Can you rearrange the curtains to have fewer folds
and see what that does to the patterns?
visited with Prof. Harry Kroto, who won the Nobel
Prize for helping to discover 'bucky balls.' He
is working very hard now on bringing science to
kids and schools all over the world. He has a
website called "The Vega Science Trust." He finds
it by searching on www.google.comfor 'vega.'
He showed me part of an online talk about DNA
by Armand Lucas that showed how you can shine a
laser pointer at a slide with a stack of tiny
parallel lines and get a row of dots on the wall.
But that works only with lines that are Very
One more question - is there a
screen on your window?
Best wishes, and
congratulations on your scientific window research.
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