Question

We are working on the wave model of light. The idea that waves can move around on the surface of a swimming pool or a pond is obvious, partly because you can see the surface of water and the waves have large enough wavelength so you can easily see it. We can see light, but the wavelength is very very short, much shorter than our unaided eyes can see. For example, our eyes are most sensitive to green light. Green light comes in a variety of wavelengths, for example, a wavelength of about 516 nanometers results in green light. That wavelength is about 1 percent of the diameter of a human hair. Pretty short! You know that the speed of light is 300,000,000 meter/second. What is the frequency of this green light in terahertz (1 Terahertz is 1012 Hz). Give your answer to at least one decimal place (that means one place to the right of the decimal point). Type your answer.

Answer 1

Given data Speed of light wave = 300,000,000 m/s = 3.00 times 10^8 m/s wavelength of light = 516 nm = 516 times 10^-9 m frequency = Speed of wave/wavelength of wave = 3.00 times 10^8 m/s/516 times 10^-9 m = 5.8139 times 10^14 Hz 10^12 Hz = 1 Tera Hz = 1/THz 1 Hz = 1/10^12 THz = > 5.8139 times 10^14 Hz = 5.8139 times 10^14/10^12 THz = 581.39 THz

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