Light Reflection: Does Electric Source Affect Places A, B & C?

AI Thread Summary
The discussion centers on how electric light sources affect light perception in different locations, emphasizing that factors like light directionality, surface reflectivity, and structural size relative to light wavelength are crucial. It is noted that in a typical scenario, such as a light bulb in a corridor, reflections would likely allow some light to be perceived in all areas. Suggestions for minimizing reflections include painting surfaces black and using specially designed foam spikes, similar to those in anechoic chambers, to absorb light and reduce backscattering. While complete elimination of reflections is challenging, these methods can significantly lower light intensity in specific areas. Overall, the conversation highlights the complexities of light behavior in various environments.
NicolasJ
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If light is from electric source, would persons on places A, B and C register any light in any spectrum.
 

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Depends. Is the light highly directed or is it being emitted isotropically in all directions? Are the surfaces highly absorbant or highly reflective. How large is your structure compared to the wavelength of light (is it visible light)?

If you're just talking about say a light bulb and a corridor I would say they all would probably see some light due to reflections.
 
Born2bwire said:
If you're just talking about say a light bulb and a corridor I would say they all would probably see some light due to reflections.

Yes light bulb and a corridor, that is what I thought. Is there any way to prevent all reflection. Maybe painting the corridor black.
 
Reflections yes. Diffractions no. There will be some light everywhere but it may be very low intensity.
 
NicolasJ said:
Yes light bulb and a corridor, that is what I thought. Is there any way to prevent all reflection. Maybe painting the corridor black.

Painting it black would certainly help. Carbon black would be good. You could also go further by placing painted rectangular spikes on the walls. We use specially painted spikes made of a foam like material in anechoic chambers to absorb radiation. The structure is pretty good for absorbing just about any kind of wave as it is also used in audio anechoic chambers. While they wouldn't be properly designed for visible light they would induce more backscattering and help break up the reflections that would normally send the light further down the corridor.
 
great idea, thank you
 
I would like to use a pentaprism with some amount of magnification. The pentaprism will be used to reflect a real image at 90 degrees angle but I also want the reflected image to appear larger. The distance between the prism and the real image is about 70cm. The pentaprism has two reflecting sides (surfaces) with mirrored coating and two refracting sides. I understand that one of the four sides needs to be curved (spherical curvature) to achieve the magnification effect. But which of the...

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