and maybe some heat...
(<- shown to the left is a picture that can be viewed through visible light)
A Visual Explaination of Light
Frequency and Wavelengh
a light wave will be seen in wavelengths from about 390 to 700 nm (Nanometers),
while it will be seen in frequencies from 430 to 790 THz (Terahertz).
(shown above is a star giving off waves of visible light)
(shown above are two stars giving off waves of visible light)
(shown above is a rainbow that gives off waves of visible light)
The Hollow Flashlight
The hollow flashlight, invented in 2013 by 15-year old Ann Makosinski originally for a google science fair, is able to create light waves without the need for conventional sources of energy such as batteries and electronic charge. Instead, it uses the heat from the human hand in order to create the sufficient energy needed to make light waves.Using four Peltier tiles, the flashlight is able to produce up to 5.4 mW at 5 foot candles of brightness. The flashlight only needs a five degree temperature difference to work. Harvesting energy by this method can provide a lot of potential for powering other small devices without having to use batteries.
"15-year-old Girl Invents Flashlight Powered by the Heat of Your Hand | ExtremeTech." ExtremeTech. Web. 14 Nov. 2014. <http://www.extremetech.com/extreme/160003-15-year-old-girl-invents-flashlight-powered-by-the-heat-of-your-hand>.
"Teen's Bright Idea: Flashlight Powered by Body Heat." TechNewsWorld: All Tech. Web. 18 Nov. 2014. <http://www.technewsworld.com/story/78412.html>.
"Teen Inventor's Bright Idea May Light Up the World - NBC News." NBC News. Web. 14 Nov. 2014. <http://www.nbcnews.com/nightly-news/teen-inventors-bright-idea-may-light-world-n103601>.
"Google Science Fair 2013." GSF 2013 : Project : The Hollow Flashlight. Web. 14 Nov. 2014. <https://www.googlesciencefair.com/en/projects/ahJzfnNjaWVuY2VmYWlyLTIwMTJyRAsSC1Byb2plY3RTaXRlIjNhaEp6Zm5OamFXVnVZMlZtWVdseUxUSXdNVEp5RUFzU0IxQnliMnBsWTNRWXA2ZVVBZ3cM>.
"Teenager Invents a Flashlight Powered by the Heat from Your Hand." TreeHugger. Web. 14 Nov. 2014. <http://www.treehugger.com/gadgets/teenager-invents-led-flashlight-thats-powered-body-heat.html>.
"The Frequency of Visible Light." Spectrums. Web. 18 Nov. 2014. <http://spectrums.com/the-frequency-of-visible-light/>.
"What Wavelength Goes With a Color?" What Wavelength Goes With a Color? Web. 18 Nov. 2014. <http://science-edu.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html>.