Higher Physics Topics: Full SQA Unit Breakdown 2026
Higher Physics topics are divided into three main areas: Our Dynamic Universe, Particles and Waves, and Electricity. These cover mechanics, gravitation and cosmology, particle and wave physics, and electrical systems including capacitors and semiconductors.
Quick Answer: The topic list is only the starting point. Our Dynamic Universe moves from mechanics into relativity and cosmology; Particles and Waves combines particle physics with wave behaviour and light; Electricity develops circuit knowledge into AC, internal resistance, capacitors and semiconductor devices. The current 2026–27 course specification also expects students to apply their knowledge to unfamiliar situations, solve problems and interpret information accurately.
The Three Higher Physics Areas
The current Higher Physics specification contains three main areas:
| Higher Physics area | Key topics |
|---|---|
| Our Dynamic Universe | Motion, forces, energy and power, collisions and impulse, gravitation, special relativity, expanding Universe |
| Particles and Waves | Charged particles, Standard Model, nuclear reactions, inverse square law, wave-particle duality, interference, spectra, refraction |
| Electricity | Alternating current, current and resistance, electrical sources, capacitors, semiconductors and p-n junctions |
These are the exact three areas named in the current specification. For the 2026–27 session, the question paper is 130 marks and lasts 2 hours 30 minutes, while the assignment remains 20 marks and is scaled to 33 marks.
Motion, Relativity and the Expanding Universe
Our Dynamic Universe combines familiar mechanics with some of the most conceptually demanding ideas in Higher Physics. The current specification covers motion, forces, energy and power, collisions and impulse, gravitation, special relativity and the expanding Universe.
Motion, forces and energy
Students work with equations and graphs describing motion, including relationships involving displacement, velocity and acceleration. Forces include Newton's laws, free-body diagrams, friction, tension and situations where the motion of an object changes.
Energy and power then bring together kinetic energy, potential energy, work done and conservation of energy. Collisions, explosions, momentum and impulse require students to identify the physical principle that applies rather than simply looking for a familiar equation.
Gravitation extends these ideas to gravitational fields, projectiles, satellites and Newton's law of universal gravitation.
Special relativity and the expanding Universe
Special relativity is one of the most conceptually demanding areas because everyday intuition can become misleading. Students need to understand that the speed of light is constant for all observers and then apply ideas such as time dilation and length contraction rather than treating the relationships as equations to memorise.
The expanding Universe brings together redshift, recessional velocity and the Hubble-Lemaître Law. Students also study evidence for the Big Bang, alongside ideas including dark matter, dark energy and stellar radiation.
A common gotcha: a student may remember the relativity equation perfectly but still choose the wrong quantity for the situation. Cosmology questions can create a similar problem because students need to connect an observation such as redshift with the physical conclusion it supports.
Particle Physics, Waves and Light
Particles and Waves brings together particle physics, nuclear physics and wave behaviour. The current specification includes forces on charged particles, the Standard Model, nuclear reactions, the inverse square law, wave-particle duality, interference, spectra and refraction.
Charged particles and the Standard Model
Students investigate forces acting on charged particles in electric and magnetic fields and apply relationships involving charge, mass, speed and energy. The course also covers particle accelerators and the behaviour of charged particles in fields.
The Standard Model introduces quarks, leptons, hadrons, baryons, mesons and bosons, together with antimatter and beta decay. Nuclear reactions then extend the particle picture into fission, fusion and mass-energy relationships.
The inverse square law is another important part of the unit, particularly when considering how irradiance changes with distance.
Wave-particle duality and light
Wave-particle duality introduces the photoelectric effect, including threshold frequency, work function and the kinetic energy of emitted electrons. The important part is understanding why the observations support a particle model of light, rather than simply inserting numbers into a memorised relationship.
Students also study interference, coherent waves, path difference and diffraction gratings. Spectra and the Bohr model connect emitted and absorbed radiation with energy levels, while refraction introduces refractive index, critical angle and total internal reflection.
A common gotcha: students can learn the photoelectric-effect relationships separately without understanding the chain connecting photon energy, threshold frequency, work function and electron kinetic energy. When the question changes the quantity being asked for, memorisation alone quickly becomes unreliable.
Circuits, AC, Capacitors and Semiconductors
Electricity covers alternating current, circuits, electrical sources, capacitors and semiconductor devices. It is often an area where students recognise the circuit diagram but struggle to decide which relationship or physical idea actually applies.
AC, circuits and internal resistance
Students work with alternating current, including peak values, root mean square values and frequency. Circuit problems become more demanding through multi-step calculations and potential divider circuits.
Electrical sources introduce electromotive force, internal resistance, lost volts and terminal potential difference. Students also need to understand situations such as open circuits and short circuits.
Capacitors and semiconductors
Capacitors involve relationships between charge, capacitance and potential difference, together with stored energy and charging and discharging behaviour. RC curves require students to interpret how a circuit changes over time rather than treating the capacitor as a static component.
Semiconductor physics introduces energy bands, conductors and insulators, doping and p-n junctions. Students then apply these ideas to forward and reverse bias, LEDs and solar cells.
A common gotcha: a circuit question may look almost identical to something a student has practised before, but the real challenge is deciding what the circuit is showing. Internal resistance and potential-divider problems are particularly useful for exposing whether the student understands the Physics or is matching numbers to a remembered procedure.
The Step Up from National 5
The biggest jump from National 5 to Higher is not simply the number of equations you need to remember. Higher Physics expects students to apply knowledge to unfamiliar situations, interpret information, solve problems and give accurate descriptions and explanations.
At National 5, a student may become comfortable recognising a familiar relationship and substituting values. At Higher, the same underlying Physics can appear inside a longer problem where the student has to identify relevant information, choose an appropriate relationship, rearrange it and interpret the result.
That is why a strong National 5 student can still find Higher Physics difficult at first. Being good at recognising question patterns is not always the same as being good at applying Physics.
The current course information recommends National 5 Physics or equivalent knowledge and experience as preparation, although entry remains at the discretion of the centre.
For students who need to strengthen that foundation, the National 5 Physics Tutor Glasgow page explains the earlier course level and the support available.
Developing Stronger Physics Skills
Learning Higher Physics as three disconnected lists of formulas rarely works. Students usually understand the course better when they know what each relationship describes physically and how it connects to the ideas around it.
Practical work matters as well. The current course guidance expects students to have opportunities to carry out a wide range of experimental work, so revision should not treat Physics as purely a calculation subject.
A useful revision cycle is:
- Understand the Physics behind the topic.
- Practise straightforward applications.
- Analyse mistakes rather than just checking the final answer.
- Revisit the concept causing difficulty.
- Apply it again in an unfamiliar question.
That final step is important. If a student can only answer a question when it looks exactly like the example they revised, the learning is not secure enough yet.
Once the basic understanding is secure, past papers become much more valuable because they show how the same Physics is presented in different contexts. Use the Higher Physics Past Papers alongside marking instructions to analyse the exact skills that still need work.
Take the Next Step with Expert Physics Support
If you understand the individual topics but find unfamiliar Higher Physics questions difficult, targeted support can make a real difference. The focus should not be on memorising more procedures, but on understanding the Physics, recognising what a question is asking and developing the confidence to apply your knowledge independently.
At Excel In MathSci, our physics tutors have taught Physics for more than 20 years between them, from National 5 through Advanced Higher. The approach is centred on identifying where a student is getting stuck, strengthening that specific area and then building the problem-solving skills needed to work through increasingly unfamiliar questions.
For students and parents looking for experienced, individual support, you can learn more about working with an Expert Physics Tutor in Glasgow and see whether the approach is right for you.
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