The maximum wavelength of light that will cause ejection of a photoelectron in silver metal is 262 nm. What is the threshold energy or minimum energy, in J, required to eject an electron from silver

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)