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University Physics II

University Physics II · Introduction to Modern Physics · 15.05

Matter waves

De Broglie wavelength, electron diffraction, wave-particle evidence, momentum dependence, and the classical small-wavelength limit.

Course-map guide · not a complete lesson or simulation

Scope & orientation

What this subsection covers

De Broglie wavelength, electron diffraction, wave-particle evidence, momentum dependence, and the classical small-wavelength limit.

A strong response uses spacetime-event diagrams and states where the model stops being reliable.

Reasoning checklist

Evidence, assumptions and limits

01

Assumptions to state

State the system, observable, approximation, and conditions held fixed before using a model.

02

Evidence to collect

Which measured trends distinguish the photon model from a classical intensity-only account?

Read the complete note

Which measured trends distinguish the photon model from a classical intensity-only account? Useful evidence includes stopping-potential data, frequency and intensity comparisons, a fitted Planck constant, residuals, and uncertainty.

03

Limits to state

This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus.

Read the complete note

This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus. Departments may redistribute weeks, laboratory hours, optics, or the modern-physics survey to match local requirements. This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus. Departments may redistribute weeks, laboratory hours, optics, or the modern-physics survey to match local requirements. Thermal physics appears as an unnumbered institutional extension: some universities assess it within Physics II, while others teach it in a separate course, so include the thermal extensions only where the local syllabus requires them. A result should be checked against units, signs, limiting cases, and the conditions under which its model was derived.

Diagram & examples

Work the claim before choosing an equation

Interactive concept map

Follow the model from claim to evidence.

01 · Physical claimMatter waves

De Broglie wavelength, electron diffraction, wave-particle evidence, momentum dependence, and the classical small-wavelength limit.

02 · RepresentationThe subsection's claim

Model, evidence, and boundary

03 · TestPrediction before measurement

What is the strongest test of a claim about Matter waves?

04 · Evidence & boundaryDecide, then qualify

Which measured trends distinguish the photon model from a classical intensity-only account? Useful evidence includes stopping-potential data, frequency and intensity comparisons, a fitted Planck constant, residuals, and uncertainty.

Interactive diagram for Matter waves: follow the physical claim through its representation, proposed test, evidence, and model boundary.

modelModel, evidence, and boundary turns the stated idea into a representation that can make a prediction.

Example questions

Try the reasoning before revealing the structure.

Diagram check

What is the strongest test of a claim about Matter waves?

Quick check

Test the reasoning, not recall

What is the strongest test of a claim about Matter waves?

Choose an answer to test the model.