When light with a wavelength of 221 nm is incident on a certain metal surface, electrons are ejected with a maximum kinetic energy of 3.28 1019 J. Determine the wavelength (in nm) of light that should be used to double the maximum kinetic energy of the electrons ejected from this surface.

Week 9 Tuesday, October 18, 2016 11:03 AM Junction rule- sum currents entering any junction must = sum current leaving that junction ○ # times can be used is # junctions in the circuit-1 Loop rule- sum of potential diff across all elements around any closed circuit loop must be 0 ○ Can make loop through circuit where all connected(in triangle pattern) Ex) loop acda: Vca+Vsc+Vad=0 (so does loops cbdc) (& acbda) ○ You need as many indep eq as you have unknowns ○ Can be used so long as new circuit element(resistor or battery) or new current appears in each new equation ○ Can be used #loops-1 times ○ Ex) going around loop from a to b for loop, det Vi if resistor is transversed in dir of cu