Incandescent Lamp: Red & Green Light Filter Color

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When white light from an incandescent lamp passes through a red filter followed by a green filter, the observed color will be darkness. The red filter allows only red light to pass while blocking other colors. The subsequent green filter then blocks the red light, resulting in no light passing through. This interaction highlights the concept of complementary colors, as red and green are complementary to each other. Therefore, unless there are imperfections in the filters, the final output will be the absence of light.
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What color of light would be observed if white light from an incandescent lamp were passed first through a red filter and then through a green filter.
 
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We can explain this phenomenon with "complementary colors". Red and green are complementary colors to each other (if I'm not wrong), so at the end I expect that darkness will result, since red filter doesn't pass red light and green light remains, and this is stopped by green filter, so no light can pass unless there is a deviation from ideality.
 
so the colors that would show up would be all the colors from an rainbow except for red and green?
 
please help?
 
dg_5021 said:
What color of light would be observed if white light from an incandescent lamp were passed first through a red filter and then through a green filter.

red filters pass red light. green filters pass green light.
depending on how selective your filters are, the red filter will remove any light that isn't red. Since the green filter removes anything that isn't green, the leftover red light will be removed by the green filter and you will end up with dark.
 

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