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im writing a obituary on Issac Newton but im need the answers to 2 questions
1.How did Issac Newton know there was seven colours in the spectrum or rainbow?

2.What other experiments is issac known for

i need the answers quite quick and i would be very grateful
thank you

2007-01-26 22:12:40 · 9 answers · asked by Gemma.♥ 2 in Science & Mathematics Physics

9 answers

he was also known for maths. There is loads on the web about him, should be easy to find even in your library!

2007-01-26 22:22:18 · answer #1 · answered by sally s 2 · 0 0

Well - there is calculus, gravity and optics for a start. Any one of those would have been a major achievement. He was an alchemist and also spent a lot of time analysing biblical texts, as he was very religious. In addition to all this, he was Lucasian Professor at Cambridge, so I guess he was pretty busy!

I reckon he could see 6 colours in the spectrum, but made it up to 7 because (as someone else mentioned) 7 is a mystical number and it would have seemed right to him for nature to work on numbers like that.

2007-01-27 21:07:15 · answer #2 · answered by Martin 5 · 0 0

Newton used a prism to divide a beam of white light into a continuous blur of colour, with violet at one end and red at the other. There are no sharp divisions in this blur and how you divide it into colours is completely subjective. Most people can see six distinct colours: violet, blue, green, yellow, orange and red.

The seventh colour (indigo) was probably invented to bring the total number up to the mystical number 7 which was considered by many to have magical properties.

2007-01-26 22:33:09 · answer #3 · answered by Gnomon 6 · 0 0

He passed the light ray through a prism.
He also did an experiment on Air Pressure called the Guinea-Feather Experiment. He proved that a coin and a feather will take the same time to fall down to the ground from a fixed height in vacuum. This happens due to buoyancy of air.

2007-01-26 22:35:18 · answer #4 · answered by ArindagR8 1 · 0 0

in accordance to WIKIPEDIA: Newton divided the spectrum into seven named shades: pink, orange, yellow, eco-friendly, blue, indigo, and violet (this order being popularly memorized by technique of schoolchildren utilizing the mnemonic ROY G. BIV). He chosen seven shades out of a concept, derived from the historic Greek sophists, that there turned right into a connection between the colors, the musical notes, the traditional products contained in the photo voltaic gadget, and the days of the week.[5][6] BTW: An "octave" in sound is at the same time as the frequency doubles. In basic, the frequency doubles from violet to pink... meaning, we see in user-friendly words one "octave" of sunshine (yet in sound we listen various octaves... is it seven?).

2016-12-03 02:45:34 · answer #5 · answered by duperne 4 · 0 0

You would be remiss if you left out that he also gave us calculus, without which, things like satellites and the Apollo missions would have been impossible.

2007-01-26 22:52:44 · answer #6 · answered by CLICKHEREx 5 · 0 0

Google the word refraction

2007-01-26 22:19:48 · answer #7 · answered by Jimbobarino 4 · 0 0

he used a prism to break the light out into its spectrum of colours.

He also did work on gravity of course.

2007-01-26 22:17:47 · answer #8 · answered by gbiaki 2 · 0 0

One assumes he could count. As for more detail then go on line and you should have enough information there to complete your task.

2007-01-26 22:17:14 · answer #9 · answered by SYJ 5 · 1 0

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