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# Does color have weight?

Is red heavier than blue or blue heavier than red? do we weigh less if we are transparent?

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### Best Answer (Chosen by Voting):

Posted by AnonymousButCandid Mar 3rd, 2013 at 2:26PM

Now, according to Einstein, all "energy" does have mass -- but "color" is a perception made by the human brain. Color is nothing more than the brain's recognition of which of your cones in the retina of your eyes have been firing in response to the light.

A perception does not have mass at all. Therefore red is not heavier than blue.

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1. Reply by Mar 3rd, 2013 at 2:54PM

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## 15 Answers to "Does color have weight?"

1. Posted by Mar 3rd, 2013 at 6:47PM

Colour is the light that doesn't get absorbed by an object. A leaf will absorb all the other colour in white light except green, which gets reflected back into your eye.

White, visible light is part of the spectrum of frequencies of the electromagnetic spectrum. X rays and gamma rays lie at the high energy end of the spectrum. Radio waves lie at the other end. Red is lower frequency and blue is the higher frequency on the visible light spectrum.

Weight is determined by mass and gravity. Light has little or no mass, so colour has little or no weight. Blue has higher energy though.

I think that's why red light is easier on your eye in low light levels. I don't actually know that to be true though, just my assumption.

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2. Posted by Mar 3rd, 2013 at 2:51PM

Gold is quite heavy

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3. Reply by Mar 3rd, 2013 at 9:05PM

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4. Posted by Mar 3rd, 2013 at 3:09PM

Colors are a small part of the EM spectrum - just the visible light part - which also includes X-rays and radio waves. Generally light is considered not to have mass, so it can't "weigh" anything. However:
http://open.salon.com/blog/kwatts59/2009/02/18/physics_what_is_the_mass_of_light
says
"So putting these equations together gives the following: E = mc2 = hc/y. Thus m = h/cy. The wavelength of visible light is from 400 to 700 nm. So to calculate the rest mass of light in the visible range, that has a wavelength of let's say 500 nm, we plug in the information and get the following:
m = 6.626 x 10-34 J s/ (3.0 x 108 m/s x 500 x 10-9 m)
m = 4.417 x 10-36 kg
So there you have it. The rest mass of a single photon of light at a wavelength of 500nm is 4.417 x 10-36 kg. Since light is never at rest, this number is actually the "effective" mass of a photon of light."

By this, blue would be heavier as its wavelength is shorter. BUT as said, light never rests (v=0 - it's always v=c). Moot point. Thanks for making me think!

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5. Reply by Mar 3rd, 2013 at 8:57PM

Huh ... can you explain this to us lay people. -- Does the weight have anything to do with the spectrum (blue travels farther & brighter vs yellow)? Just curious.

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6. Posted by Mar 3rd, 2013 at 2:28PM

paint does

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7. Reply by Mar 3rd, 2013 at 9:09PM

It would be a paper drenched in paint because it would have the properties of the paper and the paint. Paint is a kind of chemical that is colored & I don't think its the same thing. Just like a car can be red and a plane white, does that mean white is heavier? No. You need to measure each element separately.

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8. Posted by Mar 3rd, 2013 at 2:26PM

Does a shrimp weigh more if it's cooked?

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9. Reply by Mar 3rd, 2013 at 2:50PM

less- it loses moisture

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10. Posted by Mar 5th, 2013 at 12:27PM

Not physically, but mentally, different colors can be perceived to have different weights. Such as in a study...
Overall, blue is heavier than red, red is heavier than green, and green is heavier than yellow.
Brighter colors weigh less than darker ones.
Increasing saturation makes colors appear to weigh less.
Brighter backgrounds make dark colors look lighter (less heavy) and bright colors look heavier.

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11. Posted by Mar 3rd, 2013 at 3:30PM

Only subjectively, in the sense that you might consider one colour to be more important or more serious than another. Like, would you go to the office dressed in yellow?

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12. Posted by Mar 3rd, 2013 at 2:47PM

well..............................................................................................

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13. Posted by Mar 3rd, 2013 at 2:40PM

technically yeah color has weight, possibly.

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14. Posted by Mar 3rd, 2013 at 2:28PM

Yes

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15. Posted by Mar 3rd, 2013 at 2:27PM

I dont see how blue would weigh anything different than red...or why it would matter if it did

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16. Reply by Mar 3rd, 2013 at 9:17PM

I'm gathering this is one of those lets ponder the idea kind of questions. Like lets say blue did weigh more than red, do you think say airlines would not add blue to their planes to slow down the effectiveness of the ride, so they'd use less fuel to travel the same distance. Its amazing the kinds of details that emerge when you think about the possibilities of new ideas.

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17. Posted by Mar 3rd, 2013 at 2:26PM

No, they don't have weight. Colorwaves do have length, though.

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18. Posted by Mar 3rd, 2013 at 2:25PM

No, it's refracted light.

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19. Posted by Mar 3rd, 2013 at 2:24PM

They all the same to me ...

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