J JohnM UKChat Expert Joined Feb 9, 2023 Messages 4,233 Reaction score 6,083 Jun 30, 2023 #1,007 recommend the film Hidden Figures if you havent seen it.
Just-me UKChat Expert Joined Sep 21, 2022 Messages 25,388 Reaction score 5,367 Jul 4, 2023 #1,009 JohnM said: View attachment 140923 Click to expand... How do you know?
J JohnM UKChat Expert Joined Feb 9, 2023 Messages 4,233 Reaction score 6,083 Jul 4, 2023 #1,010 It’s the perception of wavelength and frequency.
Just-me UKChat Expert Joined Sep 21, 2022 Messages 25,388 Reaction score 5,367 Jul 4, 2023 #1,011 JohnM said: It’s the perception of wavelength and frequency. Click to expand... What if it’s not?
J JohnM UKChat Expert Joined Feb 9, 2023 Messages 4,233 Reaction score 6,083 Jul 4, 2023 #1,012 its what colour is, it’s depends on the detector/receptor.
