Question

problem and solution

Studies have found that many children are not well rested. Of
course, some children are simply staying up too late. One way to
prevent this is to have children go to bed earlier. Yet there is
another issue. Some children are not sleeping well because they
use their tablets and phones right before bed. These devices put
out light that keeps people awake, making it hard to both fall
asleep and stay asleep. To improve sleep, experts say bhildren
should stop looking at screens at least thirty minutes before
bedtime.​

Answer 1

Explanation:

Thus, as sunlight of all colors passes through air, the blue part causes charged particles to oscillate faster than does the red part. ... More of the sunlight entering the atmosphere is blue than violet, however, and our eyes are somewhat more sensitive to blue light than to violet light, so the sky appears blue.