Wavelengths of different colour of light

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Discussion Overview

The discussion revolves around an experiment involving the heating effect of different colors of light on water, specifically focusing on the relationship between light color, wavelength, and temperature increase in water. Participants explore the wavelengths associated with various colors of visible light.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant reports an experiment where different colors of light raise the temperature of water at different rates, with red light being more effective than blue light.
  • Another participant suggests looking up visible light on Wikipedia for approximate wavelength ranges for each color.
  • A link is shared to a resource about infrared light and its heating properties, indicating that longer wavelengths may be more effective for heating.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specific wavelengths of different colors of light, and there are multiple viewpoints regarding the effectiveness of various wavelengths for heating.

Contextual Notes

Some assumptions about the experiment's conditions, such as the intensity of light and duration of exposure, are not detailed. The discussion does not resolve the exact relationship between color, wavelength, and temperature change.

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Hey guys
Today I've done an experiment and I found that when different color of light from the same light source (put of different color filter on the same light source) shine on a beaker of water, the temperature of the water will rise.

And different light will rise the temp of water in different rate. Such as red light will rise the temperature higher than the blue light, but here is the question

May I know that the wavelength of different colur of light?
Thanks
 
Science news on Phys.org
Look up visible light on wikipedia. It should give you approximate ranges for each color.
 
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/classroom_activities/herschel_bio.html
 
Andy Resnick said:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/classroom_activities/herschel_bio.html

Thanks for the link andy! It was interesting!
 
Thanks so much for helping
 
Well the use infra red for heating stuff don't they.
The longer waves seem to work best.
 

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