Questions tagged [light]
for questions about claims based on, or related to, visible light.
29 questions
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Can a pedestal fan, with a UV lamp attached on the back and fine mesh attached on the front, catch mosquitoes?
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 ...
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Does looking at a monitor screen in a room with very low light source damage your eyes?
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 ...
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Does too much artificial lighting result in increased crime and safety problems?
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
...
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Does switching the lights off help avoiding mosquitoes?
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 ...
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Can light travel at 30x the speed of light? [closed]
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 ...
- 7,351
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Are car headlights getting brighter?
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 ...
- 57.1k
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Does UV-A light from sunlight damage our vision?
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 ...
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Does light pollution matter for Insect declines and agroecosystems?
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 ...
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Are blue lights giving people cancer?
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 ...
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Speed of light not constant as measured by many scientific / research groups, but averaged & politically standardized? [closed]
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 ...
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Can a lightbulb once inserted into your mouth be safely removed?
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 ...
- 32.4k
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Do LED light bulbs last as long as claimed by the manufacturers?
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 ...
- 1,013
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Should I refrain from putting my clothes to dry outside on a full moon?
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'...
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Are people physically sensitive to light from LEDs over other sources?
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 ...
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Do blue lights on railway platforms reduce suicide?
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 ...
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