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Putting light to work

What's on TV tonight? Why, nothing but thousands of lines full of millions of spots of light. That's what makes up the program you are watching! Part of a TV camera makes an electric copy of the...

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...