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Questions tagged [light]

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for questions about claims based on, or related to, visible light.

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Reddit's r/lifehacks has a post by user u/sovalente: a video where an electric fan is repurposed for catching mosquitoes: Amazing anti-mosquito device: a net on a fan with attached UV light to the ...
Rebecca J. Stones's user avatar
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4 votes
1 answer
2k views

Suppose a person wants to play computer games at night without turning on the room lights. The only light source in the room is that monitor screen that the person is looking at -- with normal ...
holydragon's user avatar
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6 votes
0 answers
556 views

According to a Washington Post article, Nebraska's tourism board is applying for dark sky certification for the Merritt Reservoir State Recreation Area. As part of their application, they are ...
pacoverflow's user avatar
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13 votes
1 answer
8k views

This Travel Stack Exchange answer states something I long considered for granted (probably because my parents told me so): if you want to avoid mosquitoes, switch off the light. Opening the window ...
Glorfindel's user avatar
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5 votes
1 answer
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The claim seems to be that the researchers can make light travel faster than the speed of light. Is this true? How does it even make sense? It’s in Nature so presumably there’s something in it, but ...
A E's user avatar
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15 votes
1 answer
1k views

This news story in Popular Science asks whether car headlights are getting brighter and concludes they are not: So are headlights actually getting brighter? The short answer is no—although there was ...
matt_black's user avatar
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4 votes
0 answers
411 views

Ultraviolet (UV) light is divided into wavelength bands. UV-A is the 315-400nm. The American Optometric Association claim that UV-A may cause injury to the eye: WHAT PART OF THE UV RADIATION IS ...
Alan Cook's user avatar
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3 votes
0 answers
206 views

Recently it was claimed that the increase in artificial light at night was a significant contributor to the 'ecological armageddon' of decreasing insect populations. It was further argued that the ...
LangLаngС's user avatar
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5 votes
3 answers
993 views

A recent article in Gizmodo reports: Researchers have linked the modern form of LED street lighting to higher rates of breast and prostate cancer, in a grim development that could have repercussions ...
matt_black's user avatar
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2 votes
0 answers
525 views

In banned/ removed TEDxTalk, The Science Delusion - Rupert Sheldrake at TEDx Whitechapel, the speaker has talked about various things but I am focused on the "constants" such as "light" that he has ...
Alex S's user avatar
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15 votes
1 answer
77k views

There is a viral video going around that repeats a claim I've heard before about getting a light bulb stuck in your mouth Graphic reads, The bulb shape allows it to be put into the mouth, but taking ...
Evan Carroll's user avatar
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41 votes
1 answer
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Manufacturers routinely claim that their LED light bulb can last from 20,000 hours to 50,000 hours: Anecdotes, such as this one suggest otherwise. Daily mail wrote: More than a quarter did not ...
Question Overflow's user avatar
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8 votes
1 answer
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This website (French) explains: N'étendez jamais votre linge de couleur un soir de pleine lune. En effet, ces nuits sont plus froides que les autres et font poindre une rosée contenant du peroxyde d'...
nic's user avatar
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11 votes
1 answer
4k views

The Irish Independent details the claims of a woman saying she is sensitive to LED light, and that it causes her nausea. The article explains that neurologists, opticians and ophthalmologists found ...
Mikey Mouse's user avatar
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15 votes
1 answer
970 views

Does the installation of blue lights at specific locations on station platforms reduce the incidence of suicide... at that location? using that particular method ('suicide by train')? overall? The ...
A E's user avatar
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5 votes
0 answers
279 views

The Re-Timer website states: Re-Timer is a wearable light therapy device for Winter Blues. Winter Blues is a low-mood experienced primarily during the winter months. Symptoms can include loss of ...
P_S's user avatar
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7 votes
1 answer
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I have been told time after time that at school if you are not going to leave the room for more than 10 minutes to keep the lights on instead of turning them off because the amount of power it takes ...
Nick's user avatar
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30 votes
2 answers
2k views

Many countries are phasing out incandescent light bulbs. For example, in the European Union, various types of classic light bulbs have been removed from the market in the last years. The claim is that ...
Heinzi's user avatar
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17 votes
2 answers
8k views

There is a Daily Mail article from May 2013: Do 'environmentally friendly' LED lights cause BLINDNESS? In the article, they specifically focus on blue LED lights and the wavelength of this light as ...
Dave Hilditch's user avatar
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6 votes
0 answers
236 views

Anchor New Zealand has just released a milk bottle with a black plastic layer to protect the milk from exposure to light, and thus from loss of "taste and goodness". Their chart: from their website ...
Highly Irregular's user avatar
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11 votes
1 answer
491 views

A morning talk radio program was discussing Scotopic sensitivity syndrome and made the claim that in schools where fluorescent lighting had been replaced with indirect non-fluorescent lighting had ...
Chad's user avatar
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7 votes
1 answer
783 views

Light boxes are sold as a treatment for seasonal affective disorder (SAD) and seasonal mood swings. The claims listed are: Helps to ease seasonal mood swings and winter depression, and help ...
AppliedSide's user avatar
  • 171
27 votes
3 answers
12k views

In Japan there is quite a fad about LCD blue light filtering and how they might help reduce eyestrain, etc. The web site of a major computer accessory manufacturer has an English-language press ...
Ken Y-N's user avatar
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8 votes
1 answer
4k views

High-intensity, broad-spectrum light has been an effective therapy for Seasonal Affective Disorder (SAD). More recently and less proven blue light therapy has stemmed from the discover of ganglion ...
Adam Wuerl's user avatar
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3 votes
3 answers
3k views

I'm wrapping my mind over Einstein's Special Relativity. He postulates an abolute speed of light which concludes (in my perspective) to several illogical paradoxes. Is there any evidence, that the ...
Rafael T's user avatar
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14 votes
2 answers
11k views

This is old news in Finland by now, but I don't know if these products are well known elsewhere yet. The idea of Valkee headsets is bright light therapy with a twist—the light is channeled through ...
StackExchange saddens dancek's user avatar
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48 votes
2 answers
34k views

In the Batman movies, Batman is called when a powerful yellow spotlight with the bat drawing is projected in Gotham City's clouds. The unique drawing then become very clearly visible in the clouds on ...
Victor Stafusa's user avatar
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16 votes
1 answer
8k views

I have heard that fluorescent lights are generally bad for you. The explanations range from the light being in the blue area of the spectrum: The signature "glow" of fluorescent lighting is created ...
Beofett's user avatar
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28 votes
1 answer
8k views

In his latest blog post, Jeff Atwood states: We computer geeks like it dark. Really dark. Ideally, we'd be in a cave. A cave … with an internet connection. The one thing that we can't abide is direct ...
Sklivvz's user avatar
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