query: Why does the sun appear yellow?
positive_passages.docid: 18922
positive_passages.text: Why doesn't the Sun appear green to our eyes?
negative_passages.docid: 11021
negative_passages.text: Will the night sky eventually be bright?
negative_passages.docid: 38446
negative_passages.text: How to correctly calculate the colour of the sky?
negative_passages.docid: 149168
negative_passages.text: What really is color and how do we perceive it?
negative_passages.docid: 79910
negative_passages.text: Why does a light object appear lighter in your peripheral vision when it's dark?
negative_passages.docid: 52833
negative_passages.text: Is heat always associated with Light?
negative_passages.docid: 69818
negative_passages.text: What is Superman's "normal" lifespan under the effects of a yellow sun?
negative_passages.docid: 141562
negative_passages.text: Why do night sky appear red when it is cloudy?
negative_passages.docid: 60575
negative_passages.text: Why does the Sun turn red near sunset?
negative_passages.docid: 2049
negative_passages.text: Shades of colors
negative_passages.docid: 5457
negative_passages.text: Why do shadows from the sun join each other when near enough?
negative_passages.docid: 31758
negative_passages.text: What determines color -- wavelength or frequency?
negative_passages.docid: 36773
negative_passages.text: Why do wet objects become darker?
negative_passages.docid: 136701
negative_passages.text: How can sunlight be white , but pictures of the sun be orange?
negative_passages.docid: 90676
negative_passages.text: Why do light sources appear as stars sometimes?
negative_passages.docid: 34068
negative_passages.text: Why does the sky change color? Why is the sky blue during the day, red during sunrise/set and black during the night?
negative_passages.docid: 28882
negative_passages.text: Atmospheric lighting in cycles