Olo

Our retina has types of receptors, each sensitive to a range of wavelengths - long, medium and short. But these ranges overlap in places. In particular, the medium cone is never activated on its own; there is no wavelength that only activates this receptor without also activating one of the other two. In this study, the scientists were able to stimulate the medium cones only, using extremely precise lasers directly targeting the concerned cells. The researchers would have thus produced a brand new sensation. Named “olo”. This new colour would be located outside the usual space.

The "Geometry" of Colours, from Newton to Schrödinger...

What are colours? Do they form a particular geometry? Can we build this geometry from our perceptions? All the answers in 20 minutes! 0:00 - Introduction 1:07 - What is a colour? 2:03 - Newton's disc 6:02 - The XYZ space 8:49 - Screens and vision 12:09 - Psychological approach 17:07 - Conclusion Link to the game mentioned at 13:00: http://colors2.alessandroroussel.com/ _________________________________________________ This video is narrated by Octave Masson. For more videos, subscribe to the YouTube channel : https://www.youtube.com/ScienceClicEN And if you liked this video, you can share it on social networks ! To support me on Patreon : http://www.patreon.com/ScienceClic or on Tipeee : http://tipeee.com/ScienceClic Facebook page : http://facebook.com/ScienceClic Instagram : http://instagram.com/ScienceClic Alessandro Roussel, For more info: http://www.alessandroroussel.com/en _________________________________________________ ScienceClic Français : http://youtube.com/ScienceClic ScienceClic Español : http://youtube.com/ScienceClicES _________________________________________________ Sources and bibliography: https://www.researchgate.net/publication/367216474_Helmholtz_and_the_geometry_of_color_space_gestation_and_development_of_Helmholtz's_line_element https://www.researchgate.net/publication/377372066_Helmholtz_Schrodinger_and_the_First_Non-Euclidean_Model_of_Perceptual_Color_Space https://link.springer.com/content/pdf/10.1007/s00407-023-00317-x.pdf https://www.gutenberg.org/files/33504/33504-h/33504-h.htm http://www.gutenberg-e.org/lowengard/A_Chap03.html https://royalsocietypublishing.org/doi/epdf/10.1098/rstl.1802.0004 https://pubmed.ncbi.nlm.nih.gov/17026602/ https://www.eizo.com.cn/global/library/EIZO_DCH_APPENDIXA.pdf https://www.jcgt.org/published/0014/01/01/paper.pdf http://www.color-theory-phenomena.nl/08.00.html https://rmit.pressbooks.pub/colourtheory1/chapter/modern-era-c-1850-to-1980/ https://pteromys.melonisland.net/munsell/ https://www.webexhibits.org/colorart/ganglion.html https://www.icst.pku.edu.cn/mipl/docs/F8A22B42-BDB9-137E-C51F5F9B422FE985_49512.pdf https://www.pnas.org/doi/full/10.1073/pnas.2119753119 https://www.science.org/doi/10.1126/sciadv.adu1052

https://www.youtube.com/watch?v=7KYwi2F5Ce4

Olo

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