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Ch.5 - Periodicity & Electronic Structure of Atoms

Chapter 5, Problem 26a

Two electromagnetic waves are represented below. (

(a) Which wave has the greater intensity?

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Video transcript

Welcome back everyone. We need to consider the three electromagnetic waves shown below and identify the wave with the lowest intensity. So we want to focus on just one of our answered illustrations here where we can see that we want to identify two major parts first this peak of our wave here, which we should recognize as our crest of our wave where the bottom most portion of our wave should we should recognize as our trow of our wave. And our third thing we want to identify is going to be the distance from our line of our spectrum here to the top of our crust, or the distance between the line of our spectrum to the bottom of our trow. So these two values would represent the same thing and this is going to be defined as amplitude. We want to recall the fact that the larger our value. And let's make that clear. The larger R. Value for amplitude is going to correspond to a greater intensity of our wave. And so looking at the varying amplitudes of choices A B and C. We can see that the distance between the line of our spectrum to the bottom of the trow and choice B. Is a much longer amplitude compared to choice A. And then looking at choice see the distance of our spectrum line and choice see to the bottom of the trow in choice C. Is probably the smallest amplitude that we've observed from these choices. So we can automatically consider that are correct choice to complete this example is that the wave with the lowest intensity is going to be the wave with these, or the diagram that illustrates a wave with the smallest amplitude, and that's going to be Choice C. So Choice C would be our final answer to complete this example as having a wave with the lowest intensity. I hope that everything I did was clear. If you have any questions, please leave them down below and I'll see everyone in the next practice video.