If you played with camera exposure, maybe we would have been able to see a real difference ? Plus you should have made a multi layer paint and sanded it, so no visible edges, like the spectrolum material.
I like the multiple layers and sanding ideas, the camera exposure might help us to see the differences but RU-vid color compression and the limits of your phone screen would both affect your ability to see the differences in the whites
A better question would be: why don't all metals look white? Due to the fact that most metals are almost perfect conductors, they are also almost ideal reflecting materials due to how electromagnetic waves work. A rough sheet of metal should then look white, not "metallic".
@@Anankin12 A rough sheet of metal looks gray, this means it is absorbing and reflecting light in equal amounts, I personally never saw white metal ( not without painting) so I think it most be very hard to polish a metal, to the point it becomes both reflective and very diffuse at the same time, it most be because of the way atoms are arranged very tight in metals, is very easy to polish a metal to be a perfect mirror, but very hard to polish paper for example, that is why mirrors are made of a very twin metal sheet.
@@Argoon1981 no, my point was different; according to electrodynamics, the reflectivity of very good conductors is almost 1.if you have a physics or math education, you can find the equations and its solutions in Griffith's Introduction to Electrodynamics, in the chapter about Electromagnetic Waves. Which means that more than 99% of light is reflected; and that's why our mirrors are a very thin layer of (usually) silver under a protective glass. But they don't look white when a non oxidized sheet of metal is rough. And I don't understand why.
At least the 2.0 is fluorescent. That means if you’re outdoors or have some “standard” lamps, the UV light will not reflect as non-visible UV light, but as visible blue light. That means the white can actually look whiter than white if there’s a lot of UV light. Also it becomes a somewhat bluish/cold white.
4:42 No a RGB light doesn't produce the frequency you want, just varies amount of red, green and blue to fool you eyes like it did. But with a strong light source, a prism and a slit, you could produce quite easily all the frequencies separately.
@@gabor6259 The real way to get rich is to sell a not so perfect toothpaste, then when people have teeth problems, direct them to your own dentist and sell them various services
Question about the reflectivity of different wavelengths portion: Guessing the bulb is RGB, in which case, aren’t you just testing those 3 wavelengths? Regardless of the color you see, which is just an illusion.
Have u ever tried to open an RGB bulb bcs if u open that bulb u will see that the bulb contains like 10-20 LED beads in series of size about 1.5×1.2mm and each bead consist of very very tiny RGBs array which are not visible to our naked eyes, so the case is all about dominance u know, try to understand like in our smartphone!
@@utkarshagrawal3640 Anyway, the only wavelengths that get emitted are red, green and blue. Just in different ratios. You won't get real yellow light for example.
Im confused did anyone in this comment thread even watch the whole video??? Because he literally explains it right after he finished testing the wavelengths.
To me the white 2.0 looked brighter under blue light than the spectralon. Ordered some white 2.0 recently and can't wait for it to arrive so I can see this for myself! Thanks for making this video!
Excellent ! You really come up with some amazing ideas to test I am beginning to think that this is one of THE very best YT channels I have ever come across (I am a physics Ph D , then specializing in applied vacuum and cryogenic engineering) What you are doing is also real physics-in-practice- at-home, which would be ideal for science classes at high school. I wonder if there is a way you can promote your channel to school physics teachers, and thus get more patrons (as well as subscribers ! think of all the school kids who would get hooked on physics after watching just a few of your videos !) Two suggestions about the "degrees of white" experiment : 1. Why not try to paint half the Spectralon disc with White 2.0 and then re-do the tests ? 2. Could you do a real wavelength test with a spectrum created by a prism or diffraction grating ?
these kind of videos make no sense because you can't accurately reproduce the colors on whatever screen you are watching. Would be nice to see it live though
It would be interesting to see (figuratively speaking) these same tests in the IR spectrum and UV. How does White 2.0 compare to Spretralon in reflecting IR and UV?
I don't know how you can come up with such a result lol. The reflectively here is serving as an adverb to the verb reflect meaning it reflects in a reflective manner. In no way is that acting as a noun so your statement is just incorrect. Oddly enough there is nothing grammatically wrong with this sentence and it also makes sense scientifically, it's just in simpler terms for laymen like you. On the other hand, if that was a joke it was super lame.
Hey action lab I just love your videos 😍.Can you make a video on world's lightest object carbon aerogel? Also can you try to mix the whitest white and the blackest black to make the greyest grey😂😂.
Reducing camera exposure step by step in the comparision footage might've helped showing us the difference better. Would you please try it out and include it in your next white 2.0 video?
Now mix the black 2.0 with white 2.0 exactly 50/50, then mix black 3.0 with white 2.0 50/50 and see what one is a darker grey. Not sure how you will get it exactly 50/50 but you are the action lab. You got this
A problem with viewing both white substances under the coloured light is that our visual system performs the ‘von kries transformation’. Essentially white objects ‘look white’ or can be recognised as white despite there only being a narrow range of wavelengths reflected. The best protocol would be to use a spectroradiometer to measure the reflectance across the visible spectrum to see how they compare.
Wondering if the test would be different if the white 2.0 paint was applied to a similar surface. As it wasn’t flat or smooth it seems to shows up lots of inconsistencies in its texture and obviously this will have influenced its reflection of light. You can see this in the many ridges visible in the colour spectrum test. To my eyes the the white 2.0 looked extremely comparable if not the same, sometimes less or even better. Would be interesting to see a smooth roller used on a smooth, but not gloss finished material. Perhaps the results might be different? Or perhaps they will be the same? Thanks for your excellent videos. I enjoy them very much and appreciated the effort you put in. It’s very time consuming to create, film and edit so well done 👍
i know this sounds stupid but ,every moving thing has some speed ,right? TIME is moving ,can we determine the speed of TIME and tell that it is moving faster than LIGHT . give this a like if u agree with me/interested. forgive me if i am wrong.
Awesome vid. I am so surprised by two tings. One the white paint looks much whiter than paper and two the paint looks almost as white as the spectralon.
But my problem is if the material has fluorescent properties, i.e., if the material takes the energy from the invisible spectrum (e.g. ultraviolet) and spreads it across the visible range, how would you compare? I think that is the case when it comes to white papers almost certainly containing some sort of bleaching agent.
Yes, many papers are fluorescent. Good art papers usually don’t contain brighteners. But then the pulp is always a bit yellowish too. I suppose there are papers that incorporates not-fluorescent white pigment though.
maybe it's just me, but I thought the paper was whiter, with the paint looking almost yellow. in the color test, spectralon was "dimmer" because it reflected more of the colored light making it look darker, but really it had a much deeper color making it "brighter" relative to the color of light hitting it
If you wanted to quantify how much light they reflect, maybe get a spectroscope and record the spectrum of the light source and of the two materials, then take the difference between the source and the material.
Always fun to watch your videos... For testing, would this work? I thought you were going to use a white light source and compare the spectrum of the light to the reflected light with a slit and diffraction grating. If your white light source covers the spectrum (ideally would be uniform across the spectrum) then you'd see any obvious attenuation when you compare it to the light source and the material, and then to any other material... Also, what about UV or IR?
I wish he would've put the Spectralon disc right on top of the white 2.0 paint for us who aren't looking at it in person. It might've helped us be able to see the difference better on our screens, if there is a difference ;-)
I have few doubts: 1) Will the worlds blackest material gets heated up easily when compared to spectralon? 2) In a thermodynamic scale, does the temperature of the Blacky or Whity material will be affected only on the visible spectrum or the blacky or whity material's temperature depend on the whole spectrum(from radio-gamma rays)
You can make a video about indicators, such as acidity indicators for various pH ranges (Congo Red, Nitrazine Yellow, Methyl Orange etc. etc.) and oxidation-reduction indicators (Sudan Red, Methylene Blue etc.)
When you use an incandescent light and split the light with a refractive grating and a slit, you will be able to generate all the colors natively without only having the RGB components.
So if you shined your laser at an angle on the white paint, would it still be able to "reflect" the light and make a blurry bright spot on the wall where the light hit?
