(Solved): Electront are ommed from the surface of a reetal when ifs exposed to light. This is called the phot ...

Electront are ommed from the surface of a reetal when ifs exposed to light. This is called the phototiectric affinct. Each metal has a certain threshold frequency of light, below which nothing happons. Right at this threshold trequency. an electron is emitted. Above this frequency, the Part C electron is temilied and the extra energy is What is the kifetic energy of the emited niectrons whan sosium is tapnsed to UV rays of frequancy translecred to the eloctron. \( 1.30 \times 10^{\mathrm{HF}} \mathrm{Hz} \) ? The equation for this phenemenon is Exprese your answer in joules to three significant figures. \[ K^{2} E=h y=h 3{ }^{E} \] where \( K B \) is the knetic energy of the emitied alectron, \( h=6.63 \times 10^{-34} \mathrm{~J} \). \( n \) is Piancis constant, \( N \) is the frecuency of the fight, and 40 it the theshold trequency of the metal. Also, since \( E=h y_{3} \) the equaton can also be writien as \[ K B=E-\phi \] where \( E \) is the energy of the light and \( \phi \) is the binding energy of the electron in the metal