3 ms·
> Green in the middle of the visible spectrum is the most intense, whereas blue and red fall of towards the edges of the visible spectrum, so are less intense.
by Maursault 4y ago
> Green in the middle of the visible spectrum is the most intense, whereas blue and red fall of towards the edges of the visible spectrum, so are less intense.
The Sun appears yellow and orange because green, blue and red light is scattered by the atmosphere; in space, the Sun appears white like other stars. The questions are, if green is the most intense frequencies output by white stars, why are there no green stars? And why aren't plants yellow and/or orange?
Also, I find that gathering, preparing and eating food is expensive, inefficient and time consuming. How do I get chloroplasts? Why is no one working on this?!
- dgoldstein0 4y agoThere are no green stars because stars don't just emit one wavelength, they emit a range that has a peak somewhere. If the peak is green, they also emit similar amounts of red and blue light, and all combined the result looks white. Whereas there totally are blue stars and red stars out there, because those colors are at either end of the visible spectrum, and so you can get a lot more blue than red out of a star or vice versa.
- deleted 4y ago[deleted]
- layer8 4y agoAll stars have approximately a blackbody curve as their spectrum. The sun’s spectrum happens to peak around green, and our eyes are calibrated to interpret that as neutral (white). Other stars can only have that peak shifted towards blue/violet (when hotter) or towards yellow/orange/red (when cooler), which to our eyes correspondingly looks more blue/violet or more yellow/orange/red. If our sun peaked at red or blue, we would probably be able to see green stars.
- currenciessfe 4y agoThe color of noon sun light on earth is literally the definition of white balance (6500K). So it doesn't appear yellow, unless you talk about sunset.
- Auracle 4y agoIt appears yellow if your eyes are adjusted to the color of the blue sky.
- RRWagner 4y agoWe view stars through the same atmosphere as the sun. Why aren't stars orange when near the horizon?
- layer8 4y agoThey actuality are: https://en.wikipedia.org/wiki/Extinction_(astronomy)#Atmospheric_extinction https://en.wikipedia.org/wiki/Extinction_(astronomy)#Atmosph...