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Electromagnetic Radiation
Posted: Wed Oct 17, 2018 2:52 pm
by Semi Yoon
Why does the extent of change in the electrical field at a given point decrease when the frequency of the electromagnetic radiation decreases?
Re: Electromagnetic Radiation
Posted: Wed Oct 17, 2018 4:10 pm
by marisaimbroane1J
As the frequency decreases, the amplitude of the wave also decreases. Therefore, the slope (extent of change) decreases as the waves are broadened/more spread out. Think of the extent of change as a derivative (slope) and compare a wave with high frequency to a wave with low frequency.
Re: Electromagnetic Radiation
Posted: Wed Oct 17, 2018 4:39 pm
by AustinGrove3B
The question is confusing because the "extent of the change" is a really weird way of saying the slope of the graph. It wants you to see what would happen to the slope of the wave when freq decreases (wavelength increases) and therefore slope decreases (less steep). Its just a poorly worded question.
Re: Electromagnetic Radiation
Posted: Fri Oct 19, 2018 12:56 am
by 005113695
Hi!
In this question, extent of change is really just asking how the slope is changing. When frequency decreases, the slope also decreases.