how many colours in a rainbow?

Question

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Answer 1

Richard=Red
Of=Orange
York=Yellow
Gave=Green
Battle=Blue
In=Indigo
Vein=Violet that is the order of the 7 colours of the
rainbow



Richard Of York Gave Battle In Vein

Answer 2

More than you can see (because it is a refraction of light, and the colors keep blending from one to another rather than being individual bands of defined colors) although our common perception is that of 7 colors:

"Even though a rainbow spans a continuous spectrum of colours, traditionally the full sequence of colours is most commonly cited as red, orange, yellow, green, blue, indigo and violet. It is commonly thought that indigo was included due to the different religious connotations of the numbers six and seven at the time of Isaac Newton's work on light, despite its lack of scientific significance and the poor ability of humans to distinguish colours in the blue portion of the visual spectrum.

A rainbow does not actually exist at a location in the sky, but rather is an optical phenomenon whose apparent position depends on the observer's location. All raindrops refract and reflect the sunlight in the same way, but only the light from some raindrops reaches the observer's eye. These raindrops are perceived to constitute the rainbow by that observer. The position of a rainbow in the sky is always in the opposite direction of the Sun with respect to the observer, and the interior is always slightly brighter than the exterior. The bow is centred on the shadow of the observer's head, or more exactly at the antisolar point (which is below the horizon during the daytime), appearing at an angle of approximately 40°–42° to the line between the observer's head and its shadow. As a result, if the Sun is higher than 42°, then the rainbow is below the horizon and cannot be seen as there are usually not enough raindrops between the horizon (that is: eye height) and the ground, to contribute."

Answer 3

7

Answer 4

7

Answer 5

According to Isaac Newton the colors of the rainbow are Red, Orange, Yellow, Green, Blue, Indigo and Violet - 7.

Answer 6

Red and Yellow and Pink and Green, Purple and Orange and Blue... I can sing a rainbow, sing a rainbow sing a rainbow too...
Ok that's 7

Answer 7

Richard Of York Gave Battle In Vain.

Answer 8

7 colours which are visible to the naked eye. red orange yellow green blue indigo (a dark blue) and violet. They are traditionally remembered by Richard of York gave battle in vain but my pupils used to love Run Over Your Granny Because It's Violent

Answer 9

Traditionally 7, as the others have said, but in reality, wouldn't it be infinite? Surely every frequency in between would be represented as a continuum, with us just perceiving a difference every so often (i.e. what we think of as the next colour in the rainbow).

Answer 10

there are actually more than 25 colours in a rainbow