All Questions
4
questions
1
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2
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812
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Why does purple appear in a rainbow?
It is said that people and digital cameras have color sense only for red, green and blue. So when we see violet/purple in a rainbow, whether with our eyes or in a photo, we should be seeing a color ...
- 195
0
votes
2
answers
139
views
Why does the Sun appear more round while distant stars can appear more pointed?
In a minute physics video about the shapes of stars, it mentions that stars in the night sky appear star-shaped due to imperfections in our eyes known as suture lines which cause diffraction.
Then ...
- 157
1
vote
2
answers
5k
views
The color purple in a rainbow
In a rainbow the colors order is red then orange (made from red and yellow, thus making sense that it appears in between them) the yellow followed by green after which comes blue (again green formed ...
- 11
10
votes
1
answer
14k
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Purple doesn't occur in rainbow - or does it?
Usually, when asked whether the purple color exists rainbows, an answer similar to this is given:
The purple color is perceived by human eyes via the activation of both red-sensitive and blue-...
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