When the light of wavelength 450 nm is incident on potassium, photoelectrons with stopping potential of 0.52 V are emitted. If the wavelength of the incident light is changed to 300 nm, the stopping potential is 1.90 V. Using only these numbers together with the values of the speed of light and the electron charge:
a. find the work function of potassium, in units of eV
b. compute a value for Planck's constant
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When the light of wavelength 450 nm is incident on potassium, photoelectrons with stopping potential...
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