Plants need light to make food, we need light to see, and without plants animals wouldn't eat, without animals and plants we would die.
Why are shadows and light so important in creating realistic images
so that people can see in the dark.
You can tell how big a star is using light and you can tell what elements it is made from using light.
Without it we would have to use candles that light the room dimly.
Because they display a light for the guidance of mariners.
It is very important because it helps for photosynthesis for plants, vitamin-d for human body, gives light and many uses. so it is very important
So the dentist can see what he's doing!
They need to be strong so that they don't break, and light so that they don't steal any more energy from the rider than they have to.
So that the light path is correct.
Because they are glasses for at night so she can see in the dark, and she used them in the light
so that light can come though.
so by now if Thomas Edison wasn't here we wouldn't have light