Firstly, the visible spectrum is basically white light, which can be split into 7 colors namely, Violet, Indigo, Blue, Green, Yellow, Orange and Red.
You might be wondering, why violet and indigo aren't mentioned and only blue is. That's because every color combination is achieved from blue, red and green (RGB).
Now, blue light rays have the highest energy and the shortest wavelength. This high energy strains the eye and disturbs the brain during sleep time, causing it to not relax. The human eye is not equipped to filter blue light.Therefore, they ask you to avoid using gadgets as all displays used in gadgets are RGB based and obviously, emit blue light.
Now, you might say that before sleep is the only time you get to scroll through social media or do any other work on your phone.
The only way to work around this is to enable a reading mode or a blue light filter. If you sit at a computer for most of the day, make sure you wear a glasses which protect you from it.
Blue light causes long term damage which is noticeable in some and not all.
All that said, I would still suggest that you do not use any electronics atleast 30 minutes before sleep, thereby increasing your chances of getting better sleep.
Thanks for reading! Have a nice day. 😊
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