Passage VI

Light causes some metals to eject electrons. The energy of those electrons, in joules (J), depends on the light frequency and the kind of metal. Figure 1 shows how the maximum energy of ejected electrons varies with frequency, in hertz (Hz), for 5 metals. Figure 2 shows how the number of electrons emitted by a metal varies with the intensity of light at a constant frequency. Figure 3 shows the maximum energy an ejected electron can have for a given intensity of light at a constant frequency.

33. If the data in Figure 3 was produced by a light with a frequency of 6.5 x 1014 Hz, which metal was most likely used?

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

First go back to the abscissa of figure1 to find the frequency given by the question, then look at the maximum energy in figure3 is about 2.8*10^-19J, then return to figure1 and find that only Metal A can emit the energy with this frequency at the frequency given by the question Energy electrons, so choose A