Two different metals, X and Y, are studied in separate photoelectric experiments. From the straight-line graphs of stopping potential versus frequency obtained in the two experiments, the following numerical values are extracted:
Metal X: slope = 4.13×10−15V⋅s, intercept on the frequency axis = 5.2×1014Hz
Metal Y: slope = 3.90×10−15V⋅s, intercept on the frequency axis = 4.6×1014Hz
a. Part 1: (i) Calculate the value of Planck’s constant obtained from each slope and find the percentage deviation of each result from the accepted value 6.63×10−34J⋅s.
b. Part 2: (ii) Determine the work function of each metal in eV.
c. Part 3: (iii) Which of the two data sets gives the more accurate experimental value of h? State any two plausible experimental reasons for the difference in accuracy.