Why placing a blue filter in front of a light source will give blue li

In summary, a blue filter blocks all colors except for blue, making white light appear blue. Any color filter can create a similar effect by allowing only its corresponding color to pass through. The intensity of the light will be reduced with a color filter, and the effect on the color of objects will result in a bluish tint. The effect of a blue filter may vary depending on the type of light source.
  • #1
hangover
14
0
It may be a very simple question.
Why placing a blue filter in front of a light source will give blue light?Is this phenonmenon concerned with polarization of light(the vibration of electrons of the filter giving blue light)?
Thanks very much!
 
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  • #2


No it has for sure nothing to do with polarisation, but I would say (the only reason that makes sense) that it's because of the allowed electronic transitions in the material or the allowed vibrations modes.
 
  • #3


The reason placing a blue filter in front of a light source will give blue light is due to the principle of selective transmission. A blue filter is designed to only allow blue light to pass through, while blocking other colors of light. This means that when white light passes through the blue filter, only the blue component of the light is able to pass through and reach our eyes, giving the appearance of blue light.

The phenomenon of polarization of light is not directly related to this process. Polarization refers to the direction of the electric field of a light wave, and a blue filter does not change the polarization of the light passing through it. However, some specialized filters, known as polarizing filters, can be used to selectively block certain polarizations of light, which can result in a color shift in the transmitted light.

I hope this helps to clarify the concept of selective transmission and its role in producing blue light when using a blue filter. If you have any further questions, please don't hesitate to ask.
 

1. Why does a blue filter make light appear blue?

A blue filter is designed to only allow blue light to pass through it, while blocking other colors. This means that when white light passes through the filter, only the blue wavelengths are able to pass through and reach our eyes, making the light appear blue.

2. Can any color filter create the same effect?

Yes, any color filter can create a similar effect by only allowing the corresponding color to pass through. For example, a red filter will make light appear red, a green filter will make light appear green, and so on.

3. Will the intensity of the light change with a color filter?

Yes, the intensity of the light will be reduced with a color filter because not all wavelengths of light are able to pass through. The more restrictive the filter is in terms of which colors it allows through, the lower the intensity of the light will be.

4. How does a blue filter affect the color of objects in the light?

A blue filter will make objects in the light appear to have a bluish tint because the only color of light reaching them is blue. This can alter the perceived color of objects and create a bluish hue.

5. Is the effect of a blue filter the same for all types of light sources?

No, the effect of a blue filter may vary depending on the type of light source. For example, a blue filter placed in front of a white LED light source will give a more intense blue color compared to a blue filter placed in front of a yellow incandescent light source.

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