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What is the frequency of radiation that has a wavelength of 0.952 µm?

PLEASE HELP ME! Wavelength, Electromagnetic, and frequency calculations! I don't understand!?

  • I'm not going to complain about my teacher for the WHOLE question, but she cant teach worth crap. I spent a total of two hours in her room and nothing she said made any sense because she kept backing up on what she was saying. So here I sit, staring at the THREE WORKSHEETS due TOMORROW. Oh and to top it all off, I have a test over it tomorrow! At least most of the class gets the basic stuff, how much do I get... NONE. I'm freaking out, please help mee. 1. Calculate the wavelength of electromagnetic radiation that has a frequency of 5.56 MHz. 2. Calculate the frequency of electromagnetic radiation that has a wavelength equal to 667 nm. Please show me a step by step problem as well as you can... or just give me the answers? I would appreciate knowing HOW to do it. I'm not a cheater... I'm what people would call desperate. Thanks for any one who bothers to read this.

  • Answer:

    OK. To begin with, and to make the conversion formula make sense, remember that electromagnetic radiation travels at the speed of light. So one cycle (measured in units called Hertz) of an electromagnetic wave has a wavelength equal to how far light can travel in the amount of time that one cycle takes. The cycle starts, the cycle ends, and at that moment, the beginning of the wave is a certain distance away from the transmitting antenna. That distance is the "wavelength." For instance, at a frequency of one million cycles per second (1 MHz), the wavelength is the distance that light can travel in one one-millionth of a second. So now here are the formulas. If "c" is the speed of light, then: frequency (in Hertz) = c / wavelength (in meters) and wavelength (in meters) = c / frequency (in Hertz). Remember that you have to convert your numbers to Hertz and meters from MHz and nm before applying the formula. The speed of light (c) is ... well, it's very close to 300,000,000 meters per second, but if you need the exact number you'll have to look it up.

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OK. To begin with, and to make the conversion formula make sense, remember that electromagnetic radiation travels at the speed of light. So one cycle (measured in units called Hertz) of an electromagnetic wave has a wavelength equal to how far light can travel in the amount of time that one cycle takes. The cycle starts, the cycle ends, and at that moment, the beginning of the wave is a certain distance away from the transmitting antenna. That distance is the "wavelength." For instance, at a frequency of one million cycles per second (1 MHz), the wavelength is the distance that light can travel in one one-millionth of a second. So now here are the formulas. If "c" is the speed of light, then: frequency (in Hertz) = c / wavelength (in meters) and wavelength (in meters) = c / frequency (in Hertz). Remember that you have to convert your numbers to Hertz and meters from MHz and nm before applying the formula. The speed of light (c) is ... well, it's very close to 300,000,000 meters per second, but if you need the exact number you'll have to look it up.

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