light for example is an automatically if microwaves use electronic waste heat up uh... food experience whenever you go to the doctrine to get an x_-ray image taken from the waves that on that image are x_-rays and lastly of course radio waves are not a special time of electromagnetic ways how do we use waves to transmit information that's what we're gonna try to understand and before we do that we need to understand to characteristics of ways to ways that we can quantify what makes one wave different from other but i consider this way that i have here there two things that i can as credit one i can ask how large is as well and into such a question what am i do that when someone at your know the difference between the maximum value and the central air at the will be implant and bad is something that we call the amplitude and wave terminology so let's say the plo_ tuesday so this distance isn't it and i said this distances and and the difference between the peking and the trough called the peak to peak distance is equal to rtc_ two thousand tutor to ed so that what it is a very easy rented of concept of about now how to characterize how big a wave is so the other concert that's important is called frequency and frequency is just the answer the question how fast is cycles of the wave go by so by cycle in the in the region