Question

The work function of titanium metal is 6.93 × 10⁻¹⁹ J. Calculate the kinetic energy of the ejected electrons if light of frequency 1.216 × 10¹⁵ s⁻¹ is used to irradiate the metal.

Answer 1

Answer:

6.81*10^-20 J

Explanation:

The energy from the light does two things: it removes the electrons from the surface of the metal and the rest is taken up as kinetic energy by the electrons.

K.E = hf - work function$K.E. =  6.26*10^{-34} *1.216*10^{15}  - 6.93*10^{-19}  =  6.81*10^{-20} J$