2007-01-12 14:15:51 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Yes, try liquid laundry detergent. My friends wrote all over the wall with it and you cant see it unless you turn on a black light.
2007-01-12 14:19:38 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Is that true about salt water?
you can see all colorless liquids without a black light.
they are a different medium with a different refractive index to that of air and so therefore will refract light. therefore you will be able to see the boundary between whatever medium the liquid is in.
2007-01-15 16:17:22 · answer #2 · answered by Mackey God 2 · 0⤊ 0⤋
I don't know what one would be, but yes, there has to be because at theme parks, a lot of them use a clear ink on your hand for the stamp. I bet invisible ink works that way too.
2007-01-12 22:25:49 · answer #3 · answered by thesoccerchick87 3 · 0⤊ 0⤋
salt water
2007-01-12 22:40:38 · answer #4 · answered by denbobway 4 · 0⤊ 0⤋