Physics for Sonography School Online (With Lab)- Physics is the prerequisite that defines sonography — and it’s also the one applicants most often can’t find when they need it. Campus sections fill fast or run only once a year, and many self-paced providers skip physics entirely. If you’re searching for physics for sonography online with a lab that programs will actually accept, this guide is the complete walkthrough: what the course must cover, whether you need algebra-based or calculus-based physics, one course or two, how it connects to the credentialing exam, the mistakes that get credits rejected, and how to confirm it will transfer. For the bigger picture on why this requirement exists, see physics for sonography: the prerequisite that sets it apart.
Yes. Ultrasound imaging is applied acoustics, so sonography programs require a college physics foundation before clinical coursework, and the ARDMS Sonography Principles & Instrumentation (SPI) exam is physics-based. Unlike nursing or entry-level respiratory therapy, sonography treats physics as core rather than optional — which is why clearing it is often the difference between applying this cycle and waiting for the next. The full requirement context lives in the complete sonography prerequisites guide.
It helps to understand the distinction between two kinds of physics in a sonographer’s training. The prerequisite physics course is general college physics — the foundation in waves, energy, and electricity that you complete before you’re admitted. The dedicated ultrasound physics taught inside the program (and tested by the SPI exam) builds directly on that foundation. Programs require the prerequisite precisely because students who arrive without it struggle once the ultrasound-specific physics begins.
The reason programs want physics isn’t arbitrary; nearly every topic in an introductory course reappears the moment you start scanning. A qualifying course should cover the following, and it’s worth seeing how each connects to the imaging you’ll eventually do:
| Physics topic | Why sonography cares |
|---|---|
| Wave motion & acoustics | Frequency, wavelength, and propagation speed are the foundation of every ultrasound image. |
| Reflection, refraction & attenuation | Explains how echoes form, why signals weaken with depth, and where artifacts come from. |
| Energy & force | Underpins intensity, power, and the bioeffects and safety principles of ultrasound. |
| Electricity & basic electronics | Behind the piezoelectric transducer and how the machine generates and receives signals. |
| Heat & wave behavior in media | Connects to thermal effects and how sound behaves across different tissues. |
A course that touches all of these gives you a genuine head start on the program’s ultrasound physics and the SPI exam — not just a checkbox on your transcript.
Not every online physics course will satisfy a sonography program. Look for these four things:
This trips up more applicants than it should. College physics comes in two flavors: algebra-based (often titled “College Physics”) and calculus-based (often “University Physics,” aimed at engineering and physical-science majors). Sonography programs expect the algebra-based version — it covers exactly the topics ultrasound depends on without the calculus overhead, and it aligns with the college-algebra math prerequisite most programs also require. Calculus-based physics will usually satisfy the requirement too, but it’s more work than you need. The course to avoid is a conceptual or “physical science” survey that isn’t a true college physics course, since those often won’t count. Because algebra is the foundation, take College Algebra (MATH 107) first if your math is rusty — it makes the physics far more manageable.
Read your target program’s wording carefully. A program that lists a single introductory physics course may be satisfied by one term with a lab, while a program that requires coverage of acoustics, wave motion, heat, electricity, force, and energy often needs a two-course sequence to span all of it. Taking the sequence — Physics I (PHY 115) and Physics II (PHY 116) — keeps every program on your list open instead of revealing a gap after you apply. If you’re applying to several programs with different requirements, completing the full sequence is the safest path.
Every registered sonographer must pass the ARDMS Sonography Principles & Instrumentation exam, which is essentially an ultrasound-physics and instrumentation test. The prerequisite physics course is your on-ramp: the wave behavior, attenuation, and instrumentation concepts you meet there are the same ideas, in foundational form, that the SPI exam tests in ultrasound-specific detail. Treating prerequisite physics as real preparation — rather than a hurdle to clear and forget — pays off twice: once in admission, and again when you sit the SPI.
Physics is exactly the kind of requirement self-paced online study is built for: a high-stakes, hard-to-schedule course that otherwise forces you to wait a full year for the next campus section. Studying online means you control the timeline, can devote real time to the material instead of racing a semester clock, and can finish before an application deadline. For a quantitative course, the ability to slow down on tough topics and move quickly through familiar ones is a genuine advantage — and it’s the same discipline that will serve you in the program’s ultrasound physics later.
Because there’s no fixed semester start, you can begin physics immediately and work at your own pace, often finishing well ahead of a traditional term. Build your plan backward from the application deadline and leave a buffer for the official transcript to be sent — that step routinely takes longer than students expect. If you need the full sequence, sequence PHY 115 then PHY 116, and if algebra is shaky, fit MATH 107 in first.
Before enrolling anywhere, confirm the course clears every filter a sonography program applies:
Confirm before you enroll. Physics requirements and accepted formats vary by program, and transfer acceptance is never automatic. Ask the registrar whether a regionally accredited online physics course with a lab will satisfy the requirement, whether algebra-based is accepted, and whether one course or a sequence is needed. We don’t guarantee transfer or admission.
Start with Physics I (PHY 115) and continue with Physics II (PHY 116) if your program requires the sequence. While you’re closing gaps, you can take the rest of the science core in the same place: Anatomy & Physiology I (BIO 270), Anatomy & Physiology II (BIO 275), and Statistics (MATH 220).
Yes, when the course is from a regionally accredited institution, includes a lab, and posts to an official transcript. Confirm acceptance with your target program first.
Almost always. Many sonography programs will not accept a lecture-only physics course, so choose one with a recognized lab component.
Sonography programs expect algebra-based college physics. Calculus-based usually counts too but is more than you need; a conceptual or physical-science survey typically does not qualify.
It depends on the program. Some accept a single introductory course; others require a two-course sequence to cover acoustics, waves, electricity, and energy. Confirm before enrolling.
The SPI exam tests ultrasound physics and instrumentation. Your prerequisite physics course builds the foundational wave, energy, and instrumentation concepts the SPI later tests in ultrasound-specific detail, so it doubles as early exam prep.
It can, if it’s regionally accredited, includes the required lab and topics, and meets the grade and recency rules. Transfer decisions rest with the receiving program, so confirm with the registrar.
Self-paced means there’s no semester start date, so you can begin immediately and finish at your own pace — often ahead of a fixed-term schedule. Leave time to send the transcript.
Continue with physics for sonography: the prerequisite that sets it apart, the complete sonography prerequisites guide, college algebra & statistics for sonography, and retaking prerequisites for sonography school.
Authoritative resources: the BLS Occupational Outlook for diagnostic medical sonographers, CAAHEP for accredited sonography programs, and the ARDMS, which administers the SPI exam.
