What are high frequencies and what are low frequencies? And for what they are used for?
Just tell me what are they used for and why in particular (means high freq. for some particular function then why not low frequencies there)? (noise tolerance, propagation through obstacles, ease of transmission or reception, loss ect. ) I don't want too much formulas,wave diagrams and bookish concepts. Just explain in plain school level concept. e.g. At sunrise and sunset, the sun looks red because the low frequencies in the Red Orange etc. can pass the dens distance. Why low frequencies ? Also give some practical examples relating computer science or communication so that there will not be any need to read it again and again to recall the concept. There is one thread on CE having question regarding a particular range and antenna but it's too geeky and contains only one range.
