Light waves slow down when they go from air into water. Then, once they're in the water and traveling through it, they don't change speed.
18 i’m pretty sure, if it’s wrong don’t blame me xx good luck
B) low energy, because red is on the far left of the electromagnetic spectrum.
<span>V = sqrt.(2ke) = 4m/sec.</span>
80/60=
1.3333...........................................