Having previously covered waves in general (https://physbang.com/2023/04/13/key-facts-waves/) it is now time to look at electromagnetic waves in particular as this is a topic in its own right. Electromagnetic waves are created by the movement of electrons in different situations. The electrons can be moving in an electric circuit, to produce or receive radio waves, or … Continue reading Key Facts: Electromagnetic Waves
EM Waves: Uses and Dangers
Different EM waves are used for different applications, which you are expected to be able to recall and explain. We will go through some of these uses in this article, which is unavoidably long as there is a lot of information to cover. Your exam preparation should therefore involve making summary notes from the wealth … Continue reading EM Waves: Uses and Dangers
Using the EMS to Observe Earth
When we look down on the Earth from an aircraft, we are observing the surface of the planet using visible light in a qualitative way - which means that we are simply sensing (seeing) rather than measuring the amount of light reflected. By using instrumentation, we can extract much more meaning from our observations by … Continue reading Using the EMS to Observe Earth
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