← Back to full paperPrevious questionNext question

Question 34

From Physics HL Paper 1A (May 2025, TZ2)

Grade your answerAnswer this question in practice mode and submit it for feedback.Practice under timed constraintsOpen the paper flow with timed full-exam navigation.
View source PDF page 20
  1. In two experiments X and Y measurements were made of the kinetic energies Ek of photoelectrons emitted when light is incident on two different metal surfaces.

The graph shows the variation of Ek with frequency f of the incident photons for both surfaces.

A graph showing kinetic energy (Ek) on the y-axis and frequency (f) on the x-axis, with two lines labeled X (dashed) and Y (solid) representing two different experiments.
A graph showing kinetic energy (Ek) on the y-axis and frequency (f) on the x-axis, with two lines labeled X (dashed) and Y (solid) representing two different experiments.

It can be deduced that in experiment Y…

Textbook topics in this question

Review the exact course sections assessed by each question part.