Biological Clock Depends On Color Of The Light, Not Brightness Of The Hour






Excerpt from hngn.com
Rebekah Marcarelli


The color of light could have a significant impact on the way the brain's clock measures the time of day.



The color of light could have a significant impact on the way the brain's clock measures the time of day.


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The study is the first to provide a neuronal mechanism for how the internal clock measures the changes in light color present at dawn and dusk, PLOS reported. To make their findings a team of scientists looked at light color present at different times of day to determine if it could be used to tell the time. The findings showed that at twilight, the light is much bluer than it is during the rest of the day.


"This is the first time that we've been able to test the theory that [color] affects our body clock in any mammal. It has always been very hard to separate the change in [color] to the change in brightness but using new experimental tools and a psychophysics approach we were successful," said study leader Timothy Brown from the Faculty of Life Sciences.  

The findings were published in a recent edition of the journal PLOS Biology.