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Hi, everyone.
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I'm here with problem eight from chapter seven.
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In this problem, we have a tower giving off waves out of frequency of 93 megahertz and we want to figure out what the wavelength of these waves are.
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So how can we do that? well, let's first take a look at our relationships.
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We know that these waves are traveling at a speed of three times 10 to the eighth meters per second.
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That's the speed of light.
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And normally in these problems will represent frequency as new, which looks like a view with the hook and that's typically and hurts or one over second.
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Then we also represent wavelength as lander, which looks like an upside down.
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Why and that's normally in meters.
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So now we have to be able to relate these things in some way.
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Well, if we notice the speed of light isn't the units of meters per second and we have two things which we can use to form meters per second.
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We have lambda in new or in other words, the wavelength in the frequency.
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So now we can write a new equation as see the speed of light and set these equal to new times, linda, which if we rewrite thes as units will find that this is just equal to one over a second times meter which is equal to the exacting that of the speed of light...