When I was in grade school I was convinced by another student that you could make a laser by placing a flashlight inside a drinking glass and angling it just the right way. I tried this at home and was delighted when I saw some light rays come out of the glass at weird angles. I thought for sure I had made my own homemade laser beam!
A childhood belief about physics

others believed things like this
- I used to believe that I could make a laser by putting more batteries in a flash light.— Tyler
- I used to think that if you shone a flashlight beam onto a lightbulb long enough, it would eventually light.— Karen K
- I used to believe that CD's were made of glass, until I learnt otherwise.Anon
- My cousin once told me that glass was made from ground up beetles, and I believed her! — benjymous
- i used to believe if i eat fish it would turn my stomach into a fishtank and make me turn into glass.Anon
- I used to believe that God was the light rays shining through the clouds.— Lynn