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> "The biological clock is more sensitive to blue light than longer wavelength light, or warmer colours," says Derk-Jan Dijk, professor of sleep and physiology
by rendall 4y ago
> "The biological clock is more sensitive to blue light than longer wavelength light, or warmer colours," says Derk-Jan Dijk, professor of sleep and physiology at the University of Surrey.
> "If we're exposed to too much light in the evening, our biological clock will delay," Dijk says. "When it's 11pm our biological clock thinks it's only 10pm, but we might not be sleepy yet, so we go to sleep late."
As an immigrant to lands with extreme seasonal changes in the amount of daily sunlight, this does not make a lot of sense to me, and I suspect there is more to the story. People here are no more sleep deprived than anyone else, despite the sun never setting, or always being above the horizon.
- Broken_Hippo 4y agoAs an immigrant to lands with extreme seasonal changes in the amount of daily sunlight, this does not make a lot of sense to me... Same - I didn't move up North until my 30s. The sun technically goes down where I live, but I have twilight at "night" that is so bright that I can read outside without lighting. During winter, time is just as difficult to keep track of as the sun sets around 2:30-3:00pm: Most of your evening will be in darkness. As a bonus, I get occasional northern lights even though i'm in a somewhat bright city.