The second part of the book starts off talking about AM and FM radio frequency transmission, which i am very interested in because music is my passion. AM and FM transmission are two very different radio waves being sent through the air for broadcasting. Using AM frequencies allow the user to broadcast much further than FM. But at the same time, FM frequencies have a lot more clarity compare to AM. FM frequencies also allow more than 1 channel to be broadcast on it unlike AM. There are many different stations as we all know on the FM channel. When one travel from one state to another, one will notice that FM channels start to become weaker and lose signal and slowly transform into another station. Why is that? Because FM allows users to go on it and transmit their own stations. For example many iPod adapters in cars use FM transmission for close transmission.
Sometimes new inventions are made so that everyone could afford it. For example nylon, it was created to replace silk during World War II. Because Americans did not want to buy silk from Japan, nylon was created. And nowadays nylon is used in almost everything as opposed to silk. Silk has become a luxurious item because it is so expensive. But at the same time people still purchase silk because it is softer and nicer.
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