And you know that the primary colors you were taught in grade school were (and are) wrong, right?Completely and demonstratably wrong, yet still taught. (and one of several reasons my kids no longer let me talk to their science teachers. another being that nonsense about glass being a liquid, and another being the misleading descriptions of air flow over an airplane wing. No, it doesn't go faster on top.)
How/why are they wrong? What are the correct ones? And I thought glass was a liquid, a very very viscous liquid, cos if you look at really old windows they are kind of wavy at the bottom and slightly thinner at the top. Or is this from the glass melting slightly to a liquid during the summer, then cooling back into a solid in the winter? And what is the correct flow of air over a wing?Please explain these, I'm intrigued ^_^Henrah
Possibly coz it's made from oranges!!! and therefore referring to the friut not the colour.I guess the question should be why is the juice of oranges yellow? In that case, an ornage is called an orange because the outside is orange, not becuase of the colour of the juice.
The juice is orange. What my question is, why is commercial orange juice yellow when the juice is clearly orange, as in home squeezed orange juice?
Because it's not real orange juice! It is most likely from concentrate, and/or had tons upon tons of preservatives and additives added on top.Btw, has anyone here (from the UK) tried Innocent smoothies? They are the don of all fruit juice drinks. [advertising ramble]No preservatives, no additives, and not from concentrate. And they taste great! Just fruit, squashed and put in a carton.[/advertising ramble] It's so blindingly simple, I can't believe no company has ever done it before. If you can, you should definately check out Fruit Towers, their offices, it's so classy! They have an open window with 'Burglars this way' written on an arrow leading to it: class!Henrah
This question has been bugging me for the last few days, but I finally decided ask since my dad just made some homemade orange juice, which, like I was expecting, was orange. So when I open the store bought orange juice in the morning, why is it yellow? WHY!? It doesn't list colouring as one of the ingredients.
Perhaps it is possible people see orange juice differently. Though most people are trichromats, wikipedia says there may be some women who are tetrachromats, with the addition of yellow. I had thought the tetrachromat theory rested primarily one British woman, who had a second level of red.Anyway, blue yellow and red aren't primary colors, and mixing yellow and blue will not give you green. Try it and see - if you have pure enough colors it really won't. If your blue has enough cyan it might.Your eyes have three and only three types of cone: blue, red, green. Those are the primary colors. Stimulating those three receptors in various proportions gives you the perception you see the rest. That makes it completely obvious what happens when colored light shines on your eyes. When light reflects off pigment it gets confusing. Now you are subtracting light - but it only matters in that it doesn't stimulate your only three receptors.
Tim,Completely correct. Anyone who works in the broadcast industry knows that RED,GREEN,BLUE are the real primary colours, not those other pretend primary colours that "arty" people talk about
Now, airplane wings. We've all seen the picture in the high school science book that shows air above the wing traveling further, so it must go faster, and faster air is supposedly lower pressure. But what accelerates that air to go faster? It is matter and it must obey F=ma. Well, it doesn't. It actually lags. But here's what really happens, simplified. Air is sticky, it follows the profile of the wing and is thrown downward at the back edge of the wing. Throwing the air down pushes the wing up. The math gets tricky but I think you can see the common sense of it. Okay, scratch two. I promise to answer color in a way you will probably believe shortly.
Holy crap, are you sure enough about this that I can ask my physics teacher?EDIT: Wait, what are you talking about, nothing accelerate the air, it just has to cover the larger distance of the top of the wing without slowing down. I don't get what you're saying.
Almost correct.Truth is, there are TWO sets of primary colors, and they are different if you are talking about light or pigment.
then why do birds have the similar wing design? last night i watched something about the tiger beetle being the fastest insect. suppose that design will be the next race car? i don't really know. legs might slow a car down. but they're lightweight legs. also, the beetles mostly sprint and stop when they eat their prey. but, they are fast. probably a combination (birds, insect/design) of materials (lightweight),shape, and energy expended vs. physics of how the universe affects our speed (water, air, heat, whatever).
Technically you are talking about additive mixing primaries (light) or subtractive mixing primaries (paints). Television is the best and most well known example of additive mixing. If you look closely at your picture tube, you will see RED, GREEN & BLUE dots. Each group of 3 makes a pixel (picture element). If you are a reall geek, you would be interested in knowing the Trichromatic ratio. 1 T lumen of White = 0.59 T Green + 0.3 T Red + 0.11 T Blue. The human eye is most sensitive to green.
More puzzling; why can we call the juice 'orange juice' without frowning?Actually in my first language the word orange isn't used for either the fruit or it's juice, so I really have no clue.
We call it orange juice because the name of the fruit is "orange". It really has nothing to do with the specific color of the juice (though presumably the name was chosen because the skin of the fruit is orange).As for your first language not be the word "orange", this shouldn't be surprising. It is comparitively uncommon for words in different language to have the same origin. The words that do (we all know some) are the rare case.
3. colours are formed due to the excitation of electrons from one energy level to another. when the electron drops back to its original (ground) energy state, the excess energy is lost in the form of a radiation. this radiation is the colour we observe. hope this helps.
Orange juice is not yellow. Yellow is the label we apply to the inner (visual) feeling we experience when we look at the orange juice in the photo. Therefore, yellow is not a property of the orange juice (and therefore looking for explanations in the electrons, molecules, etc.) is not going to be much help. It could also be argued that the orange juice in the photo is all colours, but yellow (since it absorbs all wave lengths ,except yellow which it reflects). Read more about the consequences (philosophical and otherwise) of the above statements in this thread: https://www.pianostreet.com/smf/index.php/topic,16738.0.html (Is grass green? Use of adjectives) https://www.pianostreet.com/smf/index.php/topic,11704.msg122476.html#msg122476 (Is grass green? Interesting discussion follows on posts by xvimbi and Ted) https://www.pianostreet.com/smf/index.php/topic,4550.msg44040.html#msg44040 (Is grass green? Linguistic consequences – long discussion about eternity) Best wishes, Bernhard.
1.the airflow thing is due to bernoulli's theorem. The aerofoil is shaped so as to provide an upward vertical force when it moves horizontally through air. This force makes the plane fly. (the cross section of the wings of a plane are shaped like an aerofoil). the air rushing past gains a higher speed on the topside than on the bottom. From Bernoulli's principle, this causes an upward force on the wings which balances the weight of the plane. Bernoulli's principle is that "as we move along a streamline the sum of pressure, kinetic energy per unit volume and the potential energy per unit volume remains a constant. 2.glass is said to be a supercooled liquid.3. colours are formed due to the excitation of electrons from one energy level to another. when the electron drops back to its original (ground) energy state, the excess energy is lost in the form of a radiation. this radiation is the colour we observe. hope this helps.ps of course Newton's laws will apply everywhere with motion , ie, in the calculations we use.
ok. so what i deduce from all this is that florida oranges get somekindof gamma rays, whilst california oranges get natural light in just the right orange frequency and wavelength to produce a real orange color. or maybe in both states there are orange oranges and yellow oranges. the yellow oranges are mutants from the orchard. they have been dancing with grapefruits and have a sort of sour/seedless/lots of juice quality - saving time and money growing simply oranges. (ok. it's not proven - but why do some oranges taste bland?).where does the glass fit in? i'm confused. oh, yes, i see. the glass you put the orange juice into. duh.
are you implying that i am not a good judge of orange?
and obviously i would talk about the different wavelengths of light. it is the different wavelengths of light which causes the different colours, after all as to the airflow thing, its true that that's what i learnt in school. so i have to check that one up.
Topic: Why is orange juice yellow? 