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HomeCXC CSEC PhysicsDiffraction and Interference of Waves
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Diffraction and Interference of Waves
Practice Questions

20 CXC CSEC Physics questions on Diffraction and Interference of Waves, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Diffraction and Interference of Waves

Question 1 · 1 mark · Difficulty 1/3

A student in Trinidad observes ocean waves passing through a narrow gap in a harbour wall. The waves spread out after passing through the gap. What is the name of this phenomenon?

  1. Reflection
  2. Refraction
  3. Diffraction
  4. Polarisation
Show answer & explanation
✓ Answer: CDiffraction
Award 1 mark for identifying diffraction as the spreading of waves when they pass through a gap or around an obstacle. A is incorrect — reflection involves waves bouncing off a surface. B is incorrect — refraction involves bending due to change in speed. D is incorrect — polarisation refers to the orientation of wave vibrations.
Question 2 · 1 mark · Difficulty 1/3

What type of interference produces a dark fringe in a two-source interference pattern?

  1. Constructive interference
  2. Destructive interference
  3. Total internal reflection
  4. Partial interference
Show answer & explanation
✓ Answer: BDestructive interference
Award 1 mark for identifying destructive interference as the cause of dark fringes where waves cancel. A is incorrect — constructive interference produces bright fringes. C is incorrect — total internal reflection is a different phenomenon involving light at boundaries. D is incorrect — 'partial interference' is not a recognised term.
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CXC CSEC Physics: Diffraction and Interference of Waves FAQ

How many CXC CSEC Physics questions on Diffraction and Interference of Waves are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Diffraction and Interference of Waves for CXC CSEC Physics, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Physics?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Diffraction and Interference of Waves practice with other Physics topics or even switch to a totally different CXC subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Diffraction and Interference of Waves questions aligned to the official CXC CSEC Physics syllabus?
Every question is written against the published CXC CSEC Physics specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC.
How is Diffraction and Interference of Waves typically tested on CXC CSEC Physics papers?
Diffraction and Interference of Waves appears across multiple question types on real CXC CSEC Physics papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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