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do radio and radar considered as applications of electromagnetic waves? if then, how do electromagnetic waves function in those applications?

just want to ask what are electromagnetic waves and how are they produced? also, do you where i can get a simple application of EM waves? just really need it... thanks!

sorry coz' i didn't understand my teacher so i thought i could get better explanations here. it's ok if those are only direct answers, it may help anyways.. thank u for the reply. other answers are still welcome.

need everyone's help... pls. explain it to me for those who knows the experiment...thanks! 1) in measuring emf by slide-wire potentiometer, why should the working battery have a voltage greater than 2? why is the galvanometer polarity unimportant? 2)how is the function of a rheostat...

does anyone knows how to do it? help and pls explain to me... thanks! 1) The slide-wire of a simple potentiometer is 2 meters long and has a resistance of 5 ohms. The emf of the working battery is 6 V and its internal resistance is 0.20 W. What resistance must be added to the working-battery...

help me with this please... i just couldn't get it. 1) a complete circuit consists of a 12.0 V battery with a 4.50 ohm resistor and switch. the internal resistance of the battery is 0.30 ohms when switch is open. what does the voltmeter read when placed: a. across the terminal of the...

Electric Field and Potential help me in answering these questions. sorry guys, not really good at physics.. thanks for the BIG help! a)Two large metal sheets carrying equal and opposite electric charged are separated by a distance of 52.0 mm. The electric field between them is uniform and...

Electric Charges and Coulomb’s Law Guys, help me solve these problems. I'm really in big trouble.. thanks guys! a)Two charges of equal magnitude exert an attractive force of 4.0x10-4 N on each other. If the magnitude of each charge is 2.0μC, how far apart are the charge? b)Three equal...

ohm's law problems. help... Research Work: What is an ideal ammeter and an ideal voltmeter? Why are voltmeters connected in parallel? Why are ammeters connected in series? Problems: answer any number that you know. thanks so much. i just neede it badly... 1.What is the potential...

i have a couple of questions and evryone can answer and explain it to me.. 1. what are the practical consequences of the observation that the electric field inside a hollow conductor is zero regardless of how much electric charge is placed on its outer surface? what does this imply regarding...

hey guys! i need some help, a big help. this is urgent... can somebodyhelp me solve this problem: what force, applied parallel to the plane, is necessary to move a 16 kg object up africtionless palne with a uniform acceleration of 2.0 m/s2 if the plane makes an angle of 60 degrees with the...