Electromagnetic Radiation

[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?

[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.

[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.

[005113695]

Hi!
In this question, extent of change is really just asking how the slope is changing. When frequency decreases, the slope also decreases.