Q217 · Practice questionComplex familiar1 mark
QUESTION 217
A metal has threshold frequency . The incident light frequency changes from to . What is the new maximum photoelectron kinetic energy divided by its original value?
(A)
(B)
(C)
(D)
WORKED SOLUTION
1 markAnswer C
ANSWER
C.
Worked solution
With , the original energy is and the new energy is . Their ratio is , rather than the ratio of incident frequencies.
Equivalent physically justified methods and consistent equivalent units accepted.
Displayed decimals are model answers; accept appropriate significant figures and consistent rounding from stated constants.
Select C.
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
View the QCAA syllabus