D860 General Physics II with Lab builds on General Physics I in WGU's secondary physics route. The program description covers heat and thermodynamics, geometric optics, and the interactions and transformations of energy within atomic and subatomic systems, with laboratory work alongside.
The range is wide, which is the usual difficulty. Thermodynamics, light and nuclear physics use different tools, so students who master one area can still lose marks in another. Lab write-ups add a further skill: turning measurements into a supported conclusion.
Course at a Glance
| Item | Details |
|---|---|
| University | Western Governors University (WGU) |
| Course code | D860 |
| Level | Undergraduate, physics content |
| Builds on | General Physics I |
| Subject area | Thermodynamics, optics, atomic and nuclear physics |
| Assessment | Set by WGU on your course page; check it before you plan |
What D860 Covers
| Theme | What it means in practice |
|---|---|
| Heat and temperature | Difference between them, heat transfer, specific heat capacity |
| Thermodynamics | Laws of thermodynamics, kinetic theory, heat engines and efficiency |
| Geometric optics | Snell's law, total internal reflection, ray tracing for lenses and mirrors |
| Wave optics | Thin film interference, dispersion, polarization, diffraction |
| Atomic and nuclear | Atomic models, spectra, radioactivity, fusion and fission |
Key Concepts Explained
Heat and Specific Heat Capacity
The heat needed to change a temperature is Q = m c delta T, where c is the specific heat capacity of the material. Water has a large c, which is why it heats and cools slowly.
Example: How much heat warms 0.50 kg of water from 20 C to 60 C? With c about 4,186 J/(kg K), Q = 0.50 x 4,186 x 40 = 83,720 J, about 84 kJ. Write the units on each line and the final answer with sensible rounding.
Refraction and Snell's Law
When light passes from one medium to another it bends: n1 sin(theta1) = n2 sin(theta2). Going into a denser medium, it bends towards the normal.
Example: Light travels from air (n = 1.00) into water (n = 1.33) at 40 degrees to the normal. sin(theta2) = sin 40 / 1.33 = 0.643 / 1.33 = 0.483, so theta2 is about 29 degrees. The ray bends towards the normal, as expected.
Heat Engines
No engine converts all heat into work. Efficiency is useful work divided by heat input, and the second law sets an upper limit based on the temperatures involved.
Typical Assignments and How to Approach Them
WGU's guidebook does not list task prompts. The table describes kinds of work this content points to. Follow your own instructions.
| Work type | What it tests | How to approach it |
|---|---|---|
| Quantitative problems | Choosing and applying formulas | List knowns, unknowns, formula, substitution, units |
| Ray diagrams | Optics reasoning | Draw with a ruler and label focal points |
| Lab report | Method, data, conclusion | Present data in tables and state uncertainty |
| Conceptual explanation | Understanding | Use words and one equation to support the idea |
A Study Approach That Works
- Review General Physics I essentials. Energy and basic algebra support everything here.
- Take one area at a time. Finish thermodynamics before optics, then nuclear.
- Do varied problems. Practice each formula in at least two contexts.
- Write the lab as you go. Record data and units immediately.
Where Students Get Stuck
- Covering one area only. The course spans thermodynamics, optics and nuclear physics, so prepare for all.
- Heat versus temperature. They are different quantities.
- Angles from the normal. Snell's law uses angles measured from the normal, not the surface.
- Kelvin versus Celsius. Use Kelvin in efficiency and gas-law work.
Planning Table
| Stage | Goal | Evidence to keep |
|---|---|---|
| Read the task | List requirements | Rubric checklist |
| Set up | Knowns, unknowns, formula | Problem sheet |
| Solve | Substitute with units | Worked steps |
| Check | Sense-check magnitude | Short note |
| Explain | State the physical meaning | One sentence |
Self-Check Questions
Check yourself across all three areas, because the course spans them.
- How much heat is needed to raise a given mass of water by a given temperature?
- Why does light bend towards the normal when it enters glass from air?
- What limits the efficiency of a heat engine?
- How do atomic emission spectra relate to energy levels?
- What distinguishes fission from fusion?
Study Tips for D860
- Keep a formula sheet with the meaning of every symbol.
- Always state units and convert before substituting.
- Estimate the answer first to catch slips.
- Draw optics diagrams to scale.
- Say in words what each answer means.
How We Help with D860
Send the task instructions, the rubric, your lab data and any feedback. A tutor can walk through thermodynamics and optics with new examples, check your working, edit your lab report for clarity, or prepare a custom solution on different numbers for you to study. Our lab report guide covers structure.
GradeEssays is independent of Western Governors University. Our work is a study and reference aid: use it to understand the method, then complete and submit your own work under WGU's academic integrity policy.
We do not invent or fabricate data. Orders are written from scratch, include free revisions within the scope of your original request, and are refunded in full if late. We cannot promise that any assessment will be passed.
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Frequently Asked Questions
WGU describes heat and thermodynamics, geometric optics, and the interactions and transformations of energy in atomic and subatomic systems, with lab work.
The course builds on General Physics I. Check your degree plan for exact prerequisites.
WGU's description does not say so. Expect algebra and trigonometry for optics. Check your course materials.
Write units on every line and convert before substituting.
No. We help you understand the method and write up your own results. We do not fabricate data.
On your D860 course page and with your instructor. WGU sets the assessment.