help wit some prelim stuff (1 Viewer)

[hsphouse]

in the topic 'the world commis'
theres a point in syllabus and it says

'describe ways in which applications of reflection of light, radio waves and microwaves have assisted in information transfer'

my book is excel, it's very shit has no info on this point.
i have no notes in my book for this point

could somone explain
thxn

 

[velox]

well think of optical fibre, where the light is complely internall refracted which allows to to make sharp turns. Radio waves, have assisted us in information transfer through radio.....Microwaves i dunno. Have u looked in ur textbook?

 

[George W. Bush]

There's so many physics summaries on the net, find a few.

Or just think about what the dot point is asking you about - information transfer with EM
light - fibreoptics, for one
radio waves - come on now
microwaves - mobiles etc.

 

[untamedanimal]

Dont forget Cds

 

[(^o^)]

Originally posted by hsphouse
my book is excel, it's very shit has no info on this point.
i have no notes in my book for this point

Do you go to Mosman High or sth? Cos that school uses Excel as their "textbook" too.
I found Excel Physics a pretty good book for a study guide, cos it actually reduces your time to make notes and it's precise in a way though it misses out some of the "dot points".

Try Jacaranda Preliminary Physics. That's the one our school is using and it's a great book with lots of information.

 

[dawso]

light - as said is just the optic fibre stuff
radio waves - reflected off 'athenosphere' which is why AM travel further than FM
micro waves - reflected in satelight dishes from bowl, up to the reviecer in the middle