Normally, water + light = rainbows
2006-12-22 09:14:13 · 8 answers · asked by me 4 in Science & Mathematics ➔ Physics
Because the spread of wavelength of a torch light is far narrower than that of natural light. Torches dont produce the infra red and ultra violet light found in natural daylight.
2006-12-22 09:29:43 · answer #1 · answered by thecoldvoiceofreason 6 · 0⤊ 4⤋
The person who says it is because of the size of fog droplets is at least partly right.
However there is such a thing as a white "rainbow." Such phenomena are called fogbows. I saw one once. It was an arc like a rainbow, but just a light streak.
You can find "fogbow" on the Internet.
2006-12-22 14:05:41 · answer #2 · answered by Ed 6 · 2⤊ 0⤋
The clue is in the name, a *rain*bow. Rain is made up of spherical drops big enough to refract the light through. Fog is made up of very fine drops that are the same sort of size as dust and are too small to refract so you just get the scattering.
2006-12-22 10:34:33 · answer #3 · answered by Anonymous · 0⤊ 0⤋
rainbows are from refraction, fog is esentially a colloid. which is a suspension so fine it cannot be seperated. it allows light thru the suspension, but its far too dense to refract.
2006-12-22 09:26:03 · answer #4 · answered by Anonymous · 0⤊ 0⤋
its too dense to refract the light needed for rainbows
2006-12-22 09:17:12 · answer #5 · answered by julie t 5 · 1⤊ 1⤋
fog is around because the sun cant get to it
so no matter what if there is fog there is no sunlight
so thyere wont be a rainbow
2006-12-22 09:18:26 · answer #6 · answered by styce 4 · 0⤊ 3⤋
Because you are at the wrong end of the light.
2006-12-22 09:17:50 · answer #7 · answered by Max 5 · 1⤊ 1⤋
You can you just need a bigger light
2006-12-22 09:21:34 · answer #8 · answered by crawler 4 · 0⤊ 1⤋