Physics • Visualized
Beautiful, interactive simulations for the classroom and beyond.
Explore core ideas through hands-on sliders, animations, and instant visual feedback. Built for students, teachers, and curious minds.
Visualize how wavelength, slit separation, and distance affect fringes.
Includes printable layouts and drag-and-drop planners.
Physics Topics
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Optics (光學)
Wave interference and light phenomena
Young's Double-Slit Experiment
Interference patterns • Wavelength • Fringe spacing
Diffraction Grating
Spectral lines • N-slit Interference • Intensity profile
Rayleigh Criterion
Resolving power • Airy disks • θ ≈ 1.22 λ/d
3D Convex Lens Image Formation
Lens formula • Ray diagrams • Real vs Virtual
3D Concave Lens Image Formation
Virtual images • Diverging rays • Lens formula
3D Primary Colour Mixing
Additive mixing • RGB spotlights • Secondary colours
Mechanics (力學)
Motion, forces, and circular dynamics
Ball & String Simulator
Circular motion • Centripetal force • Tangential velocity
Vector Force Addition
Head-to-tail method • Resultant force • Components
Projectile Motion 3D + Graphs
Solid ball • vx/vy vectors • x-t & y-t graphs
Momentum & Collision Lab
Elastic vs inelastic • p conservation • KE change
Bullet & Pumpkin Momentum (3D)
Penetration collision • 3D debris • System vs object p • vp estimate
Inclined Plane: Newton's Laws
Friction • Normal reaction • Net force • Acceleration
Work, Energy & Power Analyzer
W = Fs • KE/PE conversion • Power and efficiency
Impulse & Force-Time Graph
J = FΔt • Area under F-t • Δp comparison
Simple Harmonic Motion (簡諧運動)
Spring–mass • x–t / v–t / a–t sync • KE ↔ PE
Newton's Cannon & Satellite Orbits
Circular / elliptical orbit • Escape • GEO • F = GMm/r²
Skydiving & Terminal Velocity
Air resistance • Resultant force • v–t / a–t • Landing challenge
Wave Motion (波動)
Resonance, standing waves, and wave behavior
Standing Waves & Resonance
Modes • Nodes/antinodes • Resonance frequency
Ripple Tank (水波槽)
Reflection • Refraction • Diffraction • Interference • Strobe
Doppler Effect (多普勒效應)
Moving source • Wavefronts • f′ = f(v±vₒ)/(v∓vₛ)
Beats (拍 / 拍頻)
Two close frequencies • Envelope • fb = |f₁ − f₂|
Electromagnetism (電磁學)
Magnetic fields, currents, and forces
Magnetic Field Visualizer
Field lines • Compass behaviour • Poles • Attraction & repulsion
Magnetic Effect of Current
3D wire • Coil • Solenoid • B = μ₀I/2πr • Right-hand rule
Force Due to Magnetic Field
3D F = BIlsinθ • DC motor • F = BQvsinθ • Fleming's rule
Falling Plate in a Magnetic Field
EMF ε = Bvw • Charge separation • No current, a = g
3D Motor Effect Simulator
Lorentz force • Fleming's rule • Magnetic field visualization
3D Current Balance Simulation
Current measurement • Magnetic force • F = BIL formula
Lorentz Force Simulation
Magnetic force on conductor • Cross product • Inclined rails
CRO Wave Simulation
AC measurement • RMS vs Peak • Voltage visualization
DC Circuit & Internal Resistance
V = E - Ir • I = E/(R+r) • Load power and efficiency
RC Circuit Charging & Discharging (RC 充放電)
Vc–t / I–t sync • τ = RC • 63% / 37% markers
AC Generator (交流發電機)
ε = NBAω sin(ωt) • Peak ε₀ • Rotating coil + ε–t sine
Electrostatics Field Explorer
E-field vectors • Force on test charge • Superposition
Transformer & Power Transmission
Turns ratio • Step-up/down • Line loss and efficiency
Domestic Electricity Safety Board
Fuse • MCB • Earth wire • Safe wiring checks
Refraction, Critical Angle & TIR
Snell's law • Critical angle • Total internal reflection
Thermal Physics (熱學)
Heat, temperature, and states of matter
Energy and Use of Energy (能量和能源的使用)
HKDSE Elective 3: renewable energy, buildings and electricity at home
Wind Turbine Power
P = ½ρAv³ • Swept area • Cubic law graph • Betz limit
Solar Panel Power & Sun Path
P = ηIA cosθ • Hong Kong sun path • Panel tilt • Daily energy
Building Heat Gain, U-value & AC COP
Q/t = UAΔT • Insulation • OTTV • COP = Q/W
Astronomy and Space Science (天文學與太空科學)
HKDSE Elective 1: stars, H-R diagram and stellar evolution
Atomic & Quantum Physics (原子與量子物理)
Atomic models, photons, and quantum phenomena
Rutherford's Scattering Experiment
Alpha particles • Gold foil • Nuclear model • Scattering
Photoelectric Effect
Photon energy • Work function • Einstein's equation • KE graph
Emission & Absorption Spectrum
Bright vs dark lines • Fire photons • Spectrum detective
Bohr's Model
Energy levels • Photon jumps • Balmer & Lyman missions
Radioactive Source: Range & Penetration
Alpha/Beta/Gamma • Absorber thickness • Detector count rate
Radioactive Decay & Half-life
N = N₀(1/2)^(t/T₁/₂) • Activity curve • Random decay
Random Nature of Radioactive Decay
GM tube counts • Random fluctuations • Dice analogy
Nuclear Fission Chain Reaction & Reactor
U-235 fission • Chain reaction • Moderator • Control rods • Criticality
Classroom Tools (課堂工具)
Teaching aids and organizational tools
AI Studio (AI 工作室)
Generative AI tools powered by fal.ai
Fast to load
Pure HTML, CSS, and JS with CDN-based styling.
Mobile friendly
Responsive layouts for phones, tablets, and projectors.
Teacher ready
Great for demos, worksheets, and lab discussions.