K = (4.14. 10-15)2 – In night vision goggles, light rays cause electrons to be projected from a metal surface. The
above equation relates the kinetic energy in electron volts (eV), K, of emitted electrons to the
frequency in hertz, v, of incident light rays and the work function, o, in eV. of the metallic
surface.
In a particular set of night vision goggles, the electrons emitted must have a kinetic energy of at
least 2.46 eV. If the frequency of incoming light rays is less than 9.60 - 1014 hertz , which of
the following systems of inequalities best models the relationship between the work function, o,
and the light source frequency, ?