Why Big Bodies of Water Look Blue

Big bodies of water look blue because light plays a special game with water.

When sunlight hits the ocean or lake, it’s like a rainbow party, all the colors are there! But water acts like a filter. It lets some colors pass through and hides others.

Imagine you're wearing a blue shirt, and you stand in front of a white screen. The screen shows everything, but your shirt blocks out other colors. That’s kind of what water does.

It lets blue light travel far through the water, while it stops or slows down other colors like red or yellow. So when we look at big bodies of water from above, all that blue makes them appear blue to us.

Even on a sunny day, you might see some green or gray in a lake, but blue is the strongest color that reaches our eyes through the water. Just like how your favorite color shows up most when you're near a white wall!