# what color light is transmitted by a piece of blue glass?

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yellow

blue

white

red

orabge

• It is not blue. The glass is blue because it interacts (meaning absorbs and scatters) most strongly with blue light. The light that is transmitted, on the other hand, are the wavelengths that interact least with the glass, so they can not be blue. The answer is thus yellow, blue, red, and orange. Not white, because white is the mixture of all colors, including blue. But looking through the blue glas at a white surface will tell which color is transmitted most strongly. If the surface looks yellow, for example, it is yellow light.

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“Innovation begins with seeing what everyone has seen, and ends with thoughts that none have had before”

Albert Svent-Gyoʀԍɣ

I think there is a problem here arising from the word “transmitted”. When you look through a colored medium most of the light you see may actually have been scattered, unless you can control that. The key is whether the source is diffuse or well localized. The transmitted light is usually of a diffent color because it is of wavelengths that interact least with the medium. There is a direct relation between the property of scattering and absorption: when one is strong in a certain wavelength region, then so is the other. When I look at an opague object, and it looks red, that means that it reflects red light most strongly, but it also absorbs red light the strongest. Other wavelengths interact more weakly with that material. See the Feynman Lectures on physics, for example. I do not have them here, otherwise I would tell the page. Take a striking example: The sky looks blue because blue light is scattered most strongly by air. But when I look through the atmosphere at the sun, does the sun look blue? No, it looks yellowish or even reddish, because those colors are scattered the least. To answer the question with other objects you have to be more careful to take a situation where scattered light is well separated from transmitted light. For example, that may not be the case when you look through a bottle with a colored liquid in it. The best way to test this hypothesis is by measuring the actual transmittance as a function of wavelength, e.g. by using a different source for each wavelength, using a solid with flat surfaces. You would find that blue glass would transmit blue light the least, while scattering it the most. The danger in doing the experiment is that you will measure scattered light rather than transmitted light if you’re not careful.

• Blue. It’s called the color that it least absorbs. Transparent materials are different than solid materials. The color that you see is NOT from reflected light, but from transmitted light, hence the glass is absorbing all the colors that don’t contribute to the blue.

Glasses have a natural reflectance of about 4% per surface, so color cannot be a property of the surface. Since the color is a bulk phenomenon, it is manifested by light that enters the glass from either surface and only the blue comes back out.

• Blue. When you look at a white light (which includes all the colors) through blue glass, what do you see? Blue light. That’s because the blue light is transmitted, and the other colors are blocked. Try looking at a red light through blue glass: it will look completely black, because the red light is blocked. But turn on a blue light, and it will look exactly like a white light — since all the colors of the white light other than blue are blocked anyway.

• It’s definitely blue.

Things look blue through blue glass because blue is the only light that it lets through. That’s the whole reason that blue glass is blue.

• How the attention Sees colour colour originates in gentle. image voltaic, as we detect it, is colorless. quite, a rainbow is testimony to the undeniable fact that each and every physique the colours of the spectrum are present in white gentle. As illustrated interior the diagram under, gentle is going from the source (the solar) to the article (the apple), and finally to the detector (the attention and suggestions). a million. all the” invisible” hues of image voltaic shine on the apple. 2. the exterior of a pink apple absorbs all the coloured gentle rays, with the exception of those comparable to pink, and reflects this colour to the human eye. 3. the attention gets the contemplated pink gentle and sends a message to the suggestions. the main technically precise definition of colour is: “colour is the seen result this is brought about by using the spectral composition of the gentle emitted, transmitted, or contemplated by using products.”

• blue

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