Rainbow Definition and 59 Threads

We see red to violet but how much further does it actually extend? I suppose it comes down to (1) the wavelengths of light not strongly absorbed by the atmosphere and (2) the limits on a water drop sufficiently refracting the longer/shorter wavelengths. Is the invisible portion of a rainbow...

Someone in a physics class here proposed, a white light beam going through a meter worth of glass and because different frequences refract at different angles, a 1 cm rainbow would come out the other end. The only way I see this to be possible is for the beam to be infinetely thin. I mean REALLY...

Can some one explain how rainbow are form in term of photon. and also how photon are related into frequency.

Today's Astronomy Picture of the Day is a photograph showing a rainbow ring, inside of which is a bright region. APOD also carries a challenge - what is the explanation for sequence of colours and the bright region? Surprisingly, lots of bright students, knowledgeable teachers - even the...

why light refraction by the rain drop is red colour at bottom but blue colour on top . However we can see the rainbow is that :the red colour is at top and the blue is at bottom?

"sometimes a rainbow, baby, is better than a pile of gold" song lyrics by the band Poison. Would you rather be lucky or rich? I personally would want to be lucky cos I am sick of being unlucky. Money is not too much of a matter for me, I've been poor before. but at least now i am...

WHY DOES A RAINBOW APPEAR CURVED? AND HOW WOULD IT APPEAR FROM AN AEROPLANE( CIRCULAR?) AND WHY?

sunlight hit my cd and a rainbow was produced. can anyone tell me why ?

To know what I'm talking about you'll have to do a little experiment... Go to your bathroom, take some soap and foam up your hands. Make a "bubble" with your index finger and your thumb, then reflect the light from a lamp in the "bubble". After a little while oil-like rainbowcolored patterns...