When light of wavelength 3.50 x 10? nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted. Find (a) the work function of potassium, (b) the cutoff wavelength, and (c) the frequency corresponding to the cutoff wavelength. When monochromatic light of an unknown wavelength falls on a sample of silver, a minimum potential of 4.50 V is required to stop all of the ejected photoelectrons. With the work function of silver being 4.73 eV, determine the (a) maximum kinetic energy, (b) maximum speed of the ejected photoelectrons Calculate the minimum-wavelength x-ray that can be produced when a target is struck by an electron that has been accelerated through a potential difference of (a) 15.0 kV and (b) 1.00 x 10% kV. A microwave photon in the x-band region has a wavelength of 8.00 cm. Eind (a) the momentum and (b) the frequency of the photon. In a nonrelativistic experiment, an electron and a proton are each located along the x-axis to within an uncertainty of 2.50 ym. Determine the minimum uncertainty in the x-component of the velocity of (a) the electron, and (b) the proton