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Light wavelengths
Posted: Sun Apr 23, 2017 3:31 pm
by Konnor
Why does mouth wash appear blue or green?
Why does orange juice appear orange?
How does wavelength affect the perception of light?
Re: Light wavelengths
Posted: Tue Apr 25, 2017 4:55 pm
by rmarz
Konor - To answer your questions simply:
1) Mouthwash is blue or green because that is the color of the dye the manufacturer added to the product.
2) Orange juice appears orange because the light reflected to your eyes has a wavelength (or frequency) that is perceived as orange by your eyes.
3) Our eyes interpret or perceive color as a function of the wavelength of the reflected radiation.
The visible light spectrum human eyes can interpret is between 350 nanometers in wavelength on the deep blue end of the spectrum to about 650 nanometers on the red end.
Rick Marz