DP Physics (first assessment 2025)
Question 23M.1A.HL.TZ2.37
| Date | May 2023 | Marks available | [Maximum mark: 1] | Reference code | 23M.1A.HL.TZ2.37 |
| Level | HL | Paper | 1A | Time zone | TZ2 |
| Command term | Question number | 37 | Adapted from | N/A |
37.
[Maximum mark: 1]
23M.1A.HL.TZ2.37
Light of frequency is incident on a metallic surface of work function W. Photoelectrons with a maximum kinetic energy Emax are emitted. The frequency of the incident light is changed to 2.
What is true about the maximum kinetic energy and the work function?
| Maximum kinetic energy | Work function | |
| A. | less than 2Emax | unchanged |
| B. | less than 2Emax | greater than W |
| C. | greater than 2Emax | unchanged |
| D. | greater than 2Emax | greater than W |
[1]
Markscheme
C