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Subject Issue in 2017 Recommendations
2 Section A, Selection 1: needed in Script & Audio
inconsistency in audio recording Review.
and candidate’s paper. Audio
recording spoke about an individual
named Carlos Roa, but on
candidate’s paper, the name
Kluivert Roa was written.
Unnecessary confusion for
candidates.

Physics: CAPE Unit 1

Ques Comment Recommendations
2a Set up: Set up: Even though the students will be
2007 Syllabus Unit 1 Module 2 skeptical about light diffracting through the
SO 2.13 “describe experiments large opening in the razor blade; they will
to demonstrate diffraction of shine the light from the laser pointer
waves in both narrow and through the opening and not at one edge.
wide gaps; For example, use a We suggest that: they should therefore be
ripple tank together with both given full marks for doing this.
narrow and wide gaps,
microwaves, lasers”.  Observation: The laser beam
Diffraction at an edge is NOT spreads/diffracts into the region of
mentioned in the syllabus, just geometrical darkness/ shadow/area blocked
diffraction through a gap. by razor blade. OR The edges of the
hole/blade are not sharp due to diffraction.
Apparatus was not given for  Conclusion: Spreading/ diffraction of light
student to break the razor only occurs if light behaves as a wave and
blade and make a single slit. not as a particle. OR If light had behaved
as a particle, it would have travelled in
straight lines and there would be no
spreading/ diffraction
2a statement “disprove the
particulate nature of light”:
The particulate nature of light Proving the wave nature of light does not
is NOT mentioned in Unit 1. disprove its particulate nature.
 The syllabus objectives in
Unit 1 Module 2 make no Question requires content beyond scope of
explicit mention of the syllabus for Unit 1 and is premised on an
‘particulate nature of light’. incorrect assumption.
 Unit 1 Module 2
[Oscillations and Waves] Either withdraw the question or exercise

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