70.9nm light strikes a metal wiyh a work functon of 5.10ev what is the maximum kinetic energy of the ejected electronev what is the stopping potential
http://theory.uwinnipeg.ca/physics/quant/node3.html is very good on this.
convert 70.9nm to energy (Planck's equation). Subtract the work function, that is max KE. Stopping potential = maxKEinev/chargeonelectron