![]() ![]() Now what about visible light? Well, visible light will Once again, it's not rotating it, it's causing it to vibrate. State of its rotation, while infrared makes it vibrate. So microwave radiation caused it to rotate or to have a change in Light is when it gets absorbed, it causes this water So based on this simulation, it looks like the infrared Now we could also look at infrared light, which is once again, we have to remember, gets us into higher frequencies, and see what that does to molecules. There's a little bit ofĪ probability involved, but this is actually theīasis of how microwaves work, your microwave oven, is it causes the water molecules to get agitated in a rotational way, which increases the heat in that system. ![]() And so you can see itĭoesn't always do that. And then the water moleculeĬan also emit the radiation and then rotate differently. Rotate in a different way than it was before. Is, when it gets absorbed, it causes a rotational So if we start with microwave radiation, and here we have a water molecule, I've picked that right over there and I can get my simulation going. Or electromagnetic waves, and think about how they Gonna focus in particular, on microwave, infrared, visibleĪnd ultraviolet wavelengths of electromagnetic light, Increases in frequency and energy as we go from You can see that this isĪ logarithmic scale here. And then you get even higherįrequency, and more energy. And then you get higherįrequencies in that and higher energy, that's infrared, and then higher frequency and energy, that's visible light. The higher the frequency, there's also the higher ![]() To higher frequencies, you get to microwave, and These are some of the lowest frequencies and longest wavelengths of light. Light spectrum diagram, and we can see that on this diagram what people would normallyĬonsider radio waves. And just to get our bearings, we can click on this See how different wavelengths of electromagnetic radiationĬan interact with matter, in this case various molecules. But you can see what the simulator does is it allows us to essentially I encourage you to go to this URL and try it out for yourself. To give us an intuition here is use the PhET simulator by And when we're talking about light, we're not just talkingĪbout visible light, We're talking about electromagnetic Talk about spectroscopy, which is all about the interactions between light and matter. ![]()
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