Complementary colours and the wavelengths they absorb

[soccerboi]

Since it's not on the data booklet, do we need to commit to memory the complementary colours and the wavelengths at which  they absorb? i.e table 7.4 on pg 85 of heinemann textbook.

[charmanderp]

No, just have a general understanding. You might be required to interpret the information if they give it to you.

[Mao]

Surely the colour wheel is enough?

[charmanderp]

It's kind of hard to memorise though haha.

[Mao]

It's the rainbow in a circle? You surely know the colours of a rainbow right?

[AllAboutTheLGs]

I thought there were 7 colours in the rainbow? Whats the 8th?

[charmanderp]

It's the rainbow in a circle? You surely know the colours of a rainbow right?

Aaah I hadn't made that connection before.

[charmanderp]

I thought there were 7 colours in the rainbow? Whats the 8th?

There are seven, but the colour wheel splits the seven colours up.

[AllAboutTheLGs]

oh i see i thought that logically, it would be split into 8 equal sections

[charmanderp]

Nah because red, orange and yellow are pretty much the same thing with just a few shades in between, which applies to indigo and violet  also, which are like one each. And then three from blue and two from green.

I'm assuming it has something to do with the whole primary-secondary-tertiary colours system.

[Tonychet2]

                O             
R                           Y



I+V                         G
               B

its roygbiv but indigo and violet are together

[Mao]

It's the rainbow in a circle? You surely know the colours of a rainbow right?

Aaah I hadn't made that connection before.

Really? From memory, that colour wheel was in every chemistry textbook...

[charmanderp]

I've never actually used my textbook :/

[Mao]

I've never actually used my textbook :/

There lies your problem.

[jadams]

I've never actually used my textbook :/

Same here, I just have 500+ pages of notes from my teacher.