The photoelectric effect can be used to measure the value of Planck's constant.
NOTE: The following data are fictional, and will give a result that is quite different from the real value of Planck's constant. Be sure that you do not use
the real value of Planck's constant in any calculations here.
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Suppose that a photoelectric effect experiment was carried out using light with v = 7.56 × 10¹4 s-¹, and ejected electrons were detected with a
kinetic energy of 2.41 × 10-¹1 J. The experiment was then repeated using light with = 9.81 × 10¹4 s and the same metal target, and
electrons were ejected with a kinetic energy of 9.09 × 10-¹1 J. Use these data to find a value for Planck's constant (in J • s). Hint. It may help to start
by thinking about how you would calculate the metal's binding energy if you already knew Planck's constant.
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