Passage V

Fora photon to free an electron from a metal, the photon's frequency, f, must equal or exceed the threshold frequency, fT, for the metal. If f > fT, the photon has extra energy that is transferred to the electron as kinetic energy, resulting in the ejection of the electron from the metal. Kmax is the highest kinetic energy an ejected electron can have for a given f.

Table 1 displays fT for the metals calcium (Ca), magnesium (Mg), mercury (Hg), and platinum (Pt). Figure 1 is a graph of Kmax versus f for each of the 4 metals. Figure 2 is a graph of a photon's energy versus its f.

28. Photons having f = 11.8 x 1014 Hz and photons having f = 13.3 x 1014 Hz are shone separately upon a new metal, Metal X, resulting in ejected electrons with the following Kmax:

Based on Figure 1 and Table 1, the fT of Metal X is most likely closest to which of the following?

Answer and Explanation

Your Answer is

Correct Answer is G

Explanation

According to the table given in the title, go to figure 1 to find two points. The line connecting these two points and the X-axis intersect at about 8.0.