THERE IS A POT OF GOLD AT THE END OF A RAINBOW
this is TRUE!!!.......
I wish!!!!
we see the colours of a rainbow because light refracts (bends) when it goes into a denser material. In this case the light
goes from air into water (a single raindrop). The thing is that all the colours which we see are just the same thing (light waves or electromagnetic waves) but of
different frequency (or different wavelength). The different frequencies cause the colour sensation in our eyes/brains. BUT......different frequencies refract (bend) by
different angles...so........
all the light arrives at the raindrop from the Sun which gives out ALL the frequencies, but because different frequencies refract by different angles, the different frequencies (colours)
come out of the raindrop at different angles.
This happens in every raindrop, so if you are looking at the correct angle to see the red light, every single raindrop from one just in front of your face, to MILES away will send you red light etc.
WHITE light, which comes from the Sun, consists of all the visible frequencies and our brain just adds them together to make white.
If you stand on a ladder when the Sun is out (SAFETY.....DON'T FALL OFF) and spray drops of water from a hose, whilst pointing AWAY from the Sun, you will see a completely circular rainbow (except for where your shadow is!)
The colours of the rainbow are RED, ORANGE, YELLOW, GREEN, BLUE, INDIGO, VIOLET (that was starting at the lowest frequency or the longest wavelength)
I have heard that it was Isaac Newton who put the "indigo" in....after all how many times do you describe a colour as indigo??? He knew that there were 7 notes to an octave, A,B,C,D,E,F,G and so wanted this spread of wavelengths also to be like an octave of light, so needed 7 colours.