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Don't forget to look at the how to guide.
Discussion in 'Science' started by rachel_g41, Apr 10, 2007.
It’s how I was taught it 10 years ago, and how I teach it today ☺️
I have never heard of using a nmemonic for this, and this is exactly why, it is n't a definitive list with clear classifictations
grandma's eXalent unibrow violates iowa's marrage restrictions
Please! All this is wasting memory cells......
Just work on the principle.... ROY - G - BIV
Then you add to it..... by logical reasoning
IR -> ROY - G - BIV -> UV
Then you work on the idea that micro are longer and even longer still are radio to curve around the planet so must be added on to the red side as are ok for you, but UV is clearly not!
Radio -> Micro -> IR -> ROY - G - BIV -> UV
Finally talk about what is great to look inside your body but not turn you into a hulk....
UV -> X-Rays ->
This is a great logical way to treat the spectrum.
Also for Triple pupils I would always add in that X-Rays can be hard or soft due to how you create them with bombardment of metal with electrons. Hence, you get an overlap!
However, gamma is from a rad source and fixed!
I spent 30+ years teaching the dispersion of light with prisms and diffraction gratings but I could never with any certainty identify where the Indigo was.
I've read somewhere that Newton identified six colours and added indigo to make seven, because 7 was a lucky number or something to do with the occult. Seriously.
Yes, I have read that story as well. 7 was indeed considered a special number - seven seas, seven day of week, seven nail holes in a horseshoe, seventh son of a seventh son etc. So as God created light from other colours there must be seven of them so he stuck in Indigo between blue and purple but is it actually a separate colour? I don't think so but what do I know.
Hi, just want to know whether cathode ray tube still in the IGCSE physics syllabus?
I don't think it's specifically mentioned any more - at least in CIE - but particles in fields is required and that's a good place to cover the CRT.
Thanks, but particle fields is not in IGCSE syllabus.
Sorry, I assumed you meant the 0625 Physics - particles in fields comes in there in EM effects and Radioactivity.
Oh yes, you're right. You meant the alpha, beta particles. Thank you.
Yes, 0625 physics.