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Registered Member #2893
Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
I was sitting out back and I notice faint shadows on my shed. I had no idea why they were there, so I walked in front of it and looked around. It turns out the light was a street light, a mile away on the other side of the woods. Pretty crazy that it made it all the way through those branches.
I then took a picture, it was blurry because autofocus doesn't work well at night, and it was noisy too. I wish I had a lens with a larger aperture, but those cost a crapload and a half. Nonetheless it was a picture, 20 second exposure. It was quite a bright pic, and I was thinking to myself that all that light is coming from streetlights and headlights for miles around. Pretty crazy.
Registered Member #2893
Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Yeah. I wonder how many photons per meter squared reach the earth from say... Sirius. If I know that I could figure out the photon density at the surface of that star.
Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
Suppose you had a box containing a coil of fibre optic cable with the start and end coming out of a hole on one side with about 1 meter of flexible cable coming out to a light and a detector.
Could you know somehow if someone turned the box upside down, i.e. the light now goes counterclockwise instead of clockwise around the coil?
Registered Member #2028
Joined: Mon Mar 16 2009, 08:13PM
Location: Norway
Posts: 319
radiotech wrote ...
Suppose you had a box containing a coil of fibre optic cable with the start and end coming out of a hole on one side with about 1 meter of flexible cable coming out to a light and a detector.
Could you know somehow if someone turned the box upside down, i.e. the light now goes counterclockwise instead of clockwise around the coil?
You mean wether you could measure the orientation of the box by measuring the light coming out of the fibre?
Hmm, if you rotated the box around the axis of the coil so fast that the optic fibres inside were moving close to the speed of light, would light still keep hitting the detector? And would the Doppler effect turn the light into say, radio waves?
Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
Many things are handed, that is tend to go to the left or right. so could the lightwave have attracted an attribute that could be identified. Another way of thinking could be considering if there is some general curl direction to the universe that affects this experiment.
Light is bent by gravity. Could a giant light spiral therefore push back on gravity?
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Light goes pretty far
