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?
Lv 5
? asked in Science & MathematicsPhysics · 7 years ago

What are the colours that you see in a rainbow?

Please don't answer Red, Orange, Yellow, Green, Blue, Indigo, Violet unless those are the actual colours that you see (and you know what Indigo is AND you have a very good reason for distinguishing it from Blue).

A rainbow is not a spectrum. Rather than the absolutely sharp spectral colours, rainbow colours are smeared and slightly mixed.

The other day I saw a stunning triple rainbow. The two main bands shining were against a black sky with the third band tucked just inside the main band. There were hints of the faint 4th band inside that.

I know what I saw but I'm interested in what you see. I don't care if it's a natural rainbow in the sky or one created with a garden hose or sprinkler system. The important thing is that it was made by water droplets and you can say what you saw.

Update:

I didn't want the official answer - I can look that up as well as anyone else. I wanted to know what people actually saw.A true spectrum is generated by a narrow slit. A rainbow is generated by the Sun which is 32" of arc wide and so the colours are mixed. Also the primary band is overlaid by secondary bands. So what do you actually see?

5 Answers

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  • ?
    Lv 4
    7 years ago
    Favorite Answer

    The normally accepted rainbow colors are red, orange, yellow, green, blue, indigo, violet. But everyone sees things a little differently.

  • 7 years ago

    The colors you see in the rainbow are actually red orange yellow green blue indigo and violet. The difference between indigo and blue is that indigo is a color that looks like a cross between blue and purple. The rainbow is the same as the visible light spectrum because when you see a rainbow it is just refracted white light (which is a combination of all colors in the spectrum) that then appears spread into the different colors. Purple is not part of the rainbow because it is a combination between red and blue while violet is a distinct color of its own just as indigo is. The spectrum is said to be distinct colors but those are just the main colors we use to distinguish and define the spectrum at 7 intervals, it is really composed of those colors with mixed colors in-between as is the rainbow.

  • ?
    Lv 5
    7 years ago

    Nobody actually answered the question that was asked. Janet at least said that everyone sees things a little differently. But she, like everyone else, refused to say what she actually saw.

    For the record the colours I saw in the primary band were Red, Orange, Yellow, Cyan, Blue and Mauve. There was no Green and it was definitely Mauve not Violet. In the tertiary band just inside, there was a hint of Orange followed by Yellow and Green. Presumably the Red of the tertiary band was covered by the Violet of the primary band causing it to appear Mauve.

  • donpat
    Lv 7
    7 years ago

    Hello:

    ------------

    Red, Orange, Yellow , Green, Blue, Indigo, and Violet are the colors considered to make up a rainbow.

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  • 7 years ago

    A rainbow is composed of the entire spectrum of colors of visible light, from the longest wavelength, red, to the shortest wavelength, violet.

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