|Without light we can
see nothing. Sunlight is by far the most important source of
energy on the earth and our entire solar system. Without sunlight,
no known type of life could exist on the earth. All plants and
animals are depended on light.
Although we can see light, we
still have many questions about it. What is it? Can you fill up
a bottle with light and use it when you need some? What is light?
Is it a substance? Matter? Energy? Wave?