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for frequency measurements is usually at a frequency of 1 MHz or higher, with 5 or 10 MHz being common Frequency signals are usually sine waves, but can also be pulses or square waves If the frequency signal is an oscillating sine wave, it might look like the one shown in Fig 17 1 This signal produces one cycle (360 ? or 2 ?
The inverse of frequency graph to develop the concept that the multiplication of frequency and wavelength produce numerical values that are very close to the slope of the linear graph v = f Trial Wavelength (m) Frequency (Hz or 1/s) Addition m+s 1 1 2 5 2 6 4 2 1 05 5 6 6 61 3 0 70 8 8 9 5 4 0 64 9 2 9 84 5 0 52 11 6 12 12 Trial Wavelength (m
As the frequency goes from zero to higher values, the electron is lifted higher out of the hole, until finally at its threshold frequency it’s out When there are no photons hitting it (frequency = 0 Hz), it is completely attached to the material This is why they appear as negative values on the graph Planck’s Constant
as a function of normalized wavelength for the two indicated values of K/V /KA When the wave stabilizes, the dotted curve ends The phase speed has been defined as W R/KA, where WR is the real part of the complex frequency The solid curve on the graph is a plot of the critical JC-V /KA for Instability against wavelength Drifts above - 4 •-
4 Make a table containing the quantities Tension, Wavelength, and Wavelength Squared 5 Plot a graph with Wavelength Squared on the vertical axis and Tension on the horizontal axis Using a straightedge, draw the straight line which best represents the plotted points and passes through the origin Is the graph linear, within experimental error?