Q: What does IB Physics Syllabus 2026 - HL & SL Topic Guide for Singapore Students cover? A: Complete IB Physics syllabus guide for 2026 exams: HL and SL topic lists, Paper 1, Paper 2, Scientific Investigation requirements, and how the IB curriculum compares to H2 Physics 9478 for Singapore JC students.
TL;DR The redesigned IB Physics curriculum (first exams May 2025) eliminates the old options system and
organises all content into five themes: Space, Time and Motion; The Particulate Nature of Matter;
Wave Behaviour; Fields; and Nuclear and Quantum Physics. HL students study the same themes in
greater depth rather than choosing a separate option. The two external papers plus a 20 % Internal
Assessment means data analysis and practical investigation skills carry significant weight. Singapore students sitting
IB Physics alongside peers in JCs will find substantial overlap with H2 Physics 9478, but the IA
component and the emphasis on data analysis are distinctive IB features.[1]
Status: IB Physics subject brief and curriculum page checked 2026-06-04. Five-theme structure, Paper 1 plus Paper 2 external assessment, and 20 % Scientific Investigation weighting confirmed for the current first-assessment-2025 syllabus.
This page is the current IB Physics syllabus owner for 2026 search intent. Use the
IB Physics syllabus change guide
only when you want extra context on what changed from the older option-based syllabus.
Start here for IB Physics 2026 searchers
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Use this page for
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ib physics syllabus
The current HL and SL syllabus route, including five themes and assessment weights
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ib physics syllabus 2026
The current HL and SL topic map, paper weights, and IA overview
Stay here, then check the official IB subject brief
Do not treat the older Paper 3 option structure as current IB Physics. For the first-assessment-2025 syllabus, use Paper 1A/1B, Paper 2, and the Scientific Investigation as the public assessment frame.
IB Physics at a glance
The International Baccalaureate Diploma Programme offers Physics at two levels: Standard Level (SL) and Higher Level (HL). Both levels follow the same five-theme structure, but HL students study additional depth within each theme and sit longer exam papers.[1]
SL
HL
Recommended hours
150 h
240 h
External exam weight
80 %
80 %
Internal Assessment
20 %
20 %
External papers
Paper 1 and Paper 2
Paper 1 and Paper 2
Total external exam time
3 h
4.5 h
Unlike the pre-2025 curriculum, there are no optional topics. Every SL and HL student worldwide sits an identical core, with HL candidates additionally tested on extended material within the same five themes. This makes the curriculum simpler to plan around but demands thorough coverage - you cannot skip a theme.
Topic list - the five themes
The new curriculum replaces the old numbered topics (1 - 12 plus options) with five broad themes. Each theme contains SL core content and HL extension content.[1]
Theme A - Space, Time and Motion
SL covers kinematics (SUVAT equations, projectile motion), forces and Newton's laws, work-energy-power, momentum, and circular motion. HL adds rotational mechanics, frames of reference, and introductory ideas in general relativity and cosmology.
This is typically the first theme taught and the most familiar to students transitioning from IGCSE or IP lower-secondary physics. The mathematical demands are moderate at SL but increase sharply at HL with rotational dynamics.
Theme B - The Particulate Nature of Matter
SL covers the kinetic molecular theory, ideal gas law, internal energy, thermal energy transfer, and phase changes. HL adds entropy, the second law of thermodynamics (qualitative treatment), and more rigorous modelling of real gases.
Students comfortable with chemistry's particle model will find overlap here, but the physics treatment emphasises mathematical modelling - particularly the derivation of pressure from molecular collisions.
Theme C - Wave Behaviour
SL covers wave properties (frequency, wavelength, speed), standing waves, the Doppler effect, single-slit diffraction, and interference (double slit). HL extends into thin-film interference, resolution, and more detailed diffraction analysis.
Wave behaviour questions appear consistently on Paper 1 and Paper 2. The key challenge is translating between wave diagrams, equations, and physical contexts - for example, connecting path-difference reasoning to fringe spacing calculations.
Theme D - Fields
SL introduces gravitational and electric fields, potential energy, and basic circuits (Kirchhoff's laws, resistor combinations). HL adds magnetic fields, electromagnetic induction, and more rigorous field-theory treatment (field lines, equipotentials, inverse-square relationships).
Fields is often the theme where students struggle most, because the mathematics becomes more abstract. At HL, the interplay between electric and magnetic fields demands confidence with vector reasoning and calculus-adjacent thinking.
Theme E - Nuclear and Quantum Physics
SL covers radioactive decay (alpha, beta, gamma), nuclear reactions, mass-energy equivalence, and an introduction to the photoelectric effect. HL extends into nuclear energy levels, quantum phenomena (wave-particle duality, de Broglie wavelength), and introductory particle physics.
This theme carries fewer teaching hours than the others but appears reliably on exams. The conceptual shift from classical to quantum reasoning is the main hurdle - practise explaining phenomena using both wave and particle models.
Assessment structure
Paper 1 - Multiple Choice and Data-Based Questions
HL
SL
Duration
2 h
1.5 h
Weighting
36 %
36 %
Format
Paper 1A multiple-choice + Paper 1B data-based questions
Paper 1A multiple-choice + Paper 1B data-based questions
Paper 1 combines traditional four-option MCQs with a data-based section requiring short written responses. The data section typically presents an unfamiliar experimental scenario and asks you to extract values, calculate quantities, and evaluate results.[1]
Key skills: graph reading, unit conversion, order-of-magnitude estimation, and rapid algebraic manipulation. Check your school's IB calculator guidance before practising calculator-dependent data shortcuts.
Paper 2 - Extended Response
HL
SL
Duration
2.5 h
1.5 h
Weighting
44 %
44 %
Format
Short + long structured questions
Short + long structured questions
Paper 2 is the largest component by weighting. Questions progress from short structured parts (2 - 4 marks) to extended problems requiring multi-step calculations and written explanations. The final questions on an HL paper often demand synthesis across two or more themes.[1]
Key skills: showing working clearly (method marks are available even if the final answer is wrong), using correct SI units throughout, and structuring extended responses with logical progression.
The IA requires you to design and carry out an original physics investigation, collect and analyse data, and write up your findings within approximately 3 000 words. The assessment criteria cover personal engagement, exploration, analysis, evaluation, and communication.[1]
Common IA pitfalls for Singapore students:
Choosing an overly ambitious topic that cannot be completed in 10 hours of lab time
Presenting raw data without proper uncertainty analysis
Writing a report that reads like a school lab report rather than an independent scientific investigation
Neglecting the "personal engagement" criterion, which rewards genuine curiosity and initiative
A practical feasibility filter: before committing to an IA topic, ask three questions. Is the dependent variable measurable with school equipment? Can I control the independent variable reliably? Can I collect enough data points in 10 hours?
IB Physics vs H2 Physics 9478 - comparison for Singapore students
Many Singapore students encounter IB Physics through Integrated Programme (IP) schools or international schools, while their JC peers study H2 Physics under the 9478 syllabus. The two curricula have significant overlap but differ in structure and emphasis.
Feature
IB Physics (HL)
H2 Physics (9478)
Topics covered
5 themes (A - E), no options
20 topics across mechanics, waves, E&M, modern physics
Exam papers
Paper 1 + Paper 2 + Scientific Investigation
Paper 1 (MCQ) + Paper 2 (structured) + Paper 3 (long structured) + Paper 4 (practical)
Practical assessment
IA (20 %, independent investigation)
Paper 4 (practical exam in lab, 20 %)
Calculators
Follow current IB calculator guidance for the paper section
Scientific calculator only
Mathematical rigour
Moderate; calculus not formally required
Higher; differentiation and integration expected
Data analysis emphasis
Strong (Paper 1B + IA focus on uncertainty)
Present in written papers and Paper 4
Options / electives
None (removed from 2025)
None
Where the curricula overlap
Core mechanics (kinematics, dynamics, energy, momentum), wave phenomena (diffraction, interference, standing waves), electric circuits, and nuclear physics appear in both curricula at comparable depth. A student well-prepared for HL Physics will handle most H2 Physics content with minor adjustments.
Where they diverge
IA vs lab practical exam: The IB's IA is a sustained independent project; H2 Physics Paper 4 is a timed practical exam in a lab setting. The skill sets are different - the IA rewards experimental design and scientific writing, while Paper 4 rewards precision, speed, and following instructions.
Mathematical expectations: H2 Physics expects comfort with calculus-based derivations (for example, deriving equations of motion or applying integration to work-energy problems). IB Physics at HL keeps the mathematics accessible and does not formally require calculus, though it is useful.
Depth vs breadth: IB Physics at HL goes deeper into certain conceptual areas (relativity, cosmology) that H2 Physics does not cover. Conversely, H2 Physics covers more circuit-analysis detail and expects proficiency with alternating-current concepts.
Study strategy for Singapore IB students
Leverage the overlap
If you have access to H2 Physics resources - past papers, notes, or tuition materials - use them for the overlapping topics. Mechanics, waves, and electromagnetism problems from H2 papers provide excellent practice for IB Papers 1 and 2. The
H2 Physics notes hub organises these resources by topic.
Prioritise the IA early
The IA is worth 20 % of your grade and requires sustained work over several weeks. Start brainstorming topics in Year 1 and run a pilot experiment before committing. Schools that leave the IA to the final term create unnecessary time pressure.
Master data analysis
Paper 1B and the IA both reward strong data-handling skills. Practise the following until they are automatic:
Calculating percentage uncertainty from absolute uncertainty
Drawing best-fit and worst-fit lines on scatter plots
Using linearisation to extract physical constants from curved data
Propagating uncertainties through multi-step calculations
Build exam stamina
HL students face 4.5 hours of external exam time across Paper 1 and Paper 2. Practise under timed conditions regularly - not just individual questions, but full Paper 1A, Paper 1B, and Paper 2 blocks in sequence. The fatigue factor in a 2.5-hour Paper 2 is real and can be trained away.
Use past IB papers strategically
Since the new curriculum only started in May 2025, the pool of past papers under the new format is still small. Supplement with:
The IB-published specimen papers for the new curriculum
School-set mock papers that follow the new format
Older IB papers for content practice (noting that the question format may differ)
Is the IB Physics syllabus the same for May and November sessions? Yes. The syllabus, assessment structure, and weightings are identical for both sessions. Only the specific exam questions differ.
Can I use H2 Physics past papers to prepare for IB Physics? For content practice on overlapping topics (mechanics, waves, circuits, nuclear physics), H2 papers are excellent. However, the question format and mark allocation differ, so you should also practise with IB-format papers to calibrate your exam technique.
How important is the IA relative to the exams? At 20 % of the final grade, the IA carries the same weight as one quarter of the external assessment. A strong IA can significantly support your overall grade, especially if you find the timed papers stressful. Treat it as a serious investigation rather than a box-ticking exercise.
What calculator can I use in IB Physics exams? Use the calculator model and paper-section rules approved by your school for the current IB session. For revision, practise both non-calculator reasoning and calculator-supported data processing so Paper 1A, Paper 1B, and Paper 2 do not depend on one habit.
Do I need to know calculus for IB Physics HL? Calculus is not formally required by the IB Physics syllabus, but familiarity with basic differentiation and integration is helpful for understanding derivations and solving certain HL problems more efficiently. If you are also studying HL Mathematics, the overlap is beneficial.
