Question: Find and interpret the values of r and r 2 for the given data. Exercise 13 Data from Exercises 13 In an experiment on the

Find and interpret the values of r and r² for the given data.

Exercise 13

Data from Exercises 13

In an experiment on the photoelectric effect, the frequency of light being used was measured as well as the stopping potential (the voltage just sufficient to stop the photoelectric effect) with the results given below. Use a calculator to find the least-squares line for V as a function of f. The frequency for V = 0 is known as the threshold frequency. From the graph determine the threshold frequency.

f(PHz) 0.550 0.605 0.660 0.735 0.805 0.880 0.350 0.600 0.850 1.10 1.45

f(PHz) 0.550 0.605 0.660 0.735 0.805 0.880 0.350 0.600 0.850 1.10 1.45 1.80 V (V)

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