a) Calculate the frequency (in s-1) and the energy (in J) of a photon with the wavelength of 170 nm. (b) 170 nm light is used to remove electrons from platinum. Calculate the velocity of the emitted electron. The threshold energy for platinum is 5.0 eV. (c) What is the maximum wavelength of light that will remove an electron from platinum (the energy of this light is just enough to detach the electron). What kind of light is it (indicate the type of electromagnetic waves)?

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de Broglie Equation

The sketch of matter waves is drawn below: