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• Is the speed of light constant?

  Asked by Christian95 | 14 responses

• Why don't all light bulbs use premium parts?

  Asked by RedDeerGuy1 | 6 responses

• Why does white light from overcast days hurt my eyes?

  Asked by RedDeerGuy1 | 10 responses

• What's a reasonable price for good glow-in-the-dark paint?

  Asked by Nullo | 5 responses

• What's the difference between an indoor flood light and an outdoor flood light?

  Asked by evanchaney from iPhone | 4 responses

• How do I go about replacing my break light?

  Asked by a_love_supreme | 7 responses

• Are Kino-Flo Tungsten Balanced lights truly tungsten balanced?

  Asked by chuboy from IM | 4 responses

• "Earth Hour" scheduled for 8:30 PM-9:30 PM tomorrow, Is it the same time in every time zone?

  Asked by Mr_M | 18 responses

• Blackout curtains for doors?

  Asked by mathwhiz1987 | 7 responses

• Has anyone bought loose LEDs?

  Asked by lapilofu | 13 responses

• Why do street lamps turn on and off?

  Asked by TheBox193 | 19 responses

• Is the following analysis of Ed Walter photos of the Gulf Breeze sightings accurate?

  Asked by luigirovatti | 10 responses

• What is the best way to light a living room with a high ceiling?

  Asked by jdvanderk | 8 responses

• Is there a textbook distinction between tenebrism and chiaroscuro?

  Asked by TitsMcGhee | 4 responses

• Why can i only see dust motes in sunlight or incandescent lights?

  Asked by frigate1985 from iPhone | 5 responses

• How much of the energy the earth gets from the sun is in the visible spectrum?

  Asked by 6rant6 | 10 responses

• What is this strange phenomenon with the switch? (see details)

  Asked by Dog | 4 responses

• Can I get my Sony DSC-H20 to take pictures that look as good as a DSLR?

  Asked by Ltryptophan | 1 response

• How many watts is a 200 lux LED bulb equivalent to?

  Asked by Jbor | 4 responses

• Why do we relate the square of the speed of light in energy?

  Asked by RedDeerGuy1 | 12 responses

• Those blood cells you can see when you look at the sky--are those in the lens of your eye, or the retina, or where?

  Asked by SaganRitual | 3 responses

• What is the smallest, yet brightest, consumer flashlight out there?

  Asked by PegLeg | 6 responses

• What good uses could we get from bending light?

  Asked by oratio | 7 responses

• How do I adjust the contrast of the images that my digital SLR takes?

  Asked by TexasDude | 6 responses

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