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For CRO let me explain it to you.give me notes of natural vegetative propogation..PLEASE? anybody and CRO in Physics? Please
give me notes of natural vegetative propogation..
I wanted to ask if we can react a radioactive element like Francium with acids or not
cause our chemistry teacher said we cannot do reactions with radioactive elements
Thanks.....Ofcourse we can't. I mean Francium is HIGHLY reactive metal and reacting it with Acid can cause Major blast.
is it possible for refractive index of an object to be less then 1? reason???
Yes it is possible
hope its not too complex
arent u taking at a little higher level.There is no need to go in such detail in olevels i guessYes it is possible!
In typical media such as glass, air, water, perspex etc, one expects to find a refractive index greater than one. Light travels through the medium by sequential absorption and re-emission by the particles in the media. Think of atoms as passing a photon along like a package in a human chain. It takes time for each atom to absorb and re-emit the photon so the speed of light is slower than in vacuum. The ratio of speed in and out of the media is the refractive index. So in almost all cases the refractive index is grater than one.
However there are some cases where the refractive index of a media can be less than one.
Plasma - the refractive index of plasma is less than one n(f)= [1-(w/f)^2]^1/2
Where n(f) is the refractive index as a function of the frequency of light which is propagating through the plasma, w = the plasma frequency.
Metals - although not transparent at visible frequencies, metal is transparent to IR frequencies, and exhibits an index less than one. This is because there is a more complex mechanism used by the atoms to pass the photon through the medium. In conductors like metal, its very complicated as magnetism and moving electrons in atoms become important.
NOTE: It is the phase velocity that becomes faster than the speed of light. The group velocity of light can never exceed the speed light! Information and energy travels with the group velocity and so violation of relativity or Maxwell's equations.
hope its not too complex
Source:http://wiki.answers.com/Q/Is_it_possible_to_have_a_refractive_index_less_than_one
Yep You are rightarent u taking at a little higher level.There is no need to go in such detail in olevels i guess
please give full question so i maybe able to help.e) suggest a suitable method for investigating the effect of a given variable on the speed of a reaction.... i dont understand what does this part means
http://www.scribd.com/doc/56077784/Speed-of-Reaction can u tell me where to find this type of documents i mean the one from singapore 5072please give full question so i maybe able to help.
can anyone tell me where to find 5072 chemistry singapore sw files please help me because it has notes in this one of these docs is above
luckly even i found the same files thanks anyways man... but so far there is negligible difference between the two or i believe there is no difference as i saw there syllabus it is exactly the same as ours(though i didnt go through full syllabus)http://www.scribd.com/doc/38821401/Chemistry-Air-Atmosphere-Syllabus-notes
http://www.scribd.com/doc/38755971/Organic-Chemistry-Syllabus-Notes
http://www.scribd.com/doc/40235202/Chemistry-Finalized-Notes
There is difference though... So don't confuse yourself when you see anything which isn't from your syllabus...
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