Ouch! When you went swimming, the sun wasn't very bright and the air wasn't very hot. But now you have a stinging sunburn! Where did you get it? Your sunburn came from light---but not from light...
A rainbow of colors
Sunsets and traffic lights, campfires and TV screens---light comes in many different colors. What makes the colors different? Why do we see a rainbow of colors? All the colors of light are given off...
Colors we see
The cheese in your sandwich is orange. The tomato is bright red. The lettuce is green. The light brown bread has a dark brown crust. You would be surprised if your sandwich had red cheese, a brown...
Dark-room pictures
Materials - blanket or cloth (heavy) - coffee can - hammer - nail (small) - rubber band - waxed paper What does the camera \"see" when you take a picture? You can't climb inside it to find...
Smile for the camera
There you are with that stuffed bear you had when you were two. And here you are with that big fish you caught last summer. Both times someone took your picture. The camera made a copy of the way you...
Glowing eyes
Silently the tiger crouches, its striped coat blending perfectly with the evening shadows. A deer is coming! The tiger turns its head to watch---and suddenly its eyes begin to glow with a strange...
Seeing it clearly
> The lens in your eye bends light rays and makes them focus, or come > together, at the back of your eye. Your eyes don't hurt, but the doctor says you need glasses. Why? How can glasses help your...
A water-drop lens
You can make a lens from anything that is curved and clear---even a drop of water. Here is an easy way to make a magnifying lens. Materials - cardboard - food wrap (clear plastic) - medicine...
Close-ups
Its huge, glittering eyes stare at you. Its big mouth opens and closes, opens and closes. But suddenly it swims to the other side of the bowl. It's only a small goldfish, after all! Why did the...
Mirror, mirror
Who is that person in the mirror? It seems to be another you, doing exactly what you are doing. How can a mirror \"copy" you? A mirror is very smooth. The front of a mirror is Hat, polished glass....