Q4 · 2024 · Paper 1Simple familiar1 mark
QUESTION 4
Two experiments were conducted, and the following observations were made.
Experiment 1 Light passing through a double slit produces a diffraction pattern.
Experiment 2 Above a specific frequency, light incident on a metallic surface produces photoelectrons with discrete amounts of energy.
Which statement can be supported by the observations?
(A)
A wave theory of light can completely describe the nature of light.
(B)
The bending of light is a result of light behaving as a particle.
(C)
The particle model only describes some properties of light.
(D)
Only light waves can travel in a vacuum.
WORKED SOLUTION
1 markAnswer C
ANSWER
C
Worked solution
The double-slit result supports wave behaviour, while the photoelectric effect requires a photon model. Therefore the particle model describes only some properties of light. Option C.
Selects option C.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.