Topics that are hard to picture on paper, built as 3D models you can rotate, cut open and measure. Free, no login, works on phones.
Last updated: 26 October 2026
Drag to rotate, two fingers or right-drag to pan, pinch or scroll to zoom. The toolbar has top/front/side views, auto-rotate, play/pause/step, a cutaway slider, a measure tool and “show the maths”, which lights up the part of the model each formula term refers to. Low-power mode helps on older phones.
| Subject | Lab | What you can do |
|---|---|---|
| Physics | Magnetic Field Around a Straight Wire (3D) | See the circular magnetic field lines around a current-carrying wire in 3D and measure B at any distance. |
| Physics | Electromagnetic Wave in 3D | Watch the electric and magnetic fields of a light wave in 3D and see how frequency and B₀ follow from λ and E₀. |
| Physics | Electric Field Lines and Equipotentials in 3D | Trace 3D electric field lines and equipotential surfaces of a point charge, a dipole, two like charges and a charged sheet, and read E and V at a probe. |
| Physics | Gauss's Law and Electric Flux in 3D | Move charges in and out of a 3D Gaussian sphere or cube and watch the total flux follow Φ = q_enclosed/ε₀. |
| Physics | Magnetic Field of a Current Loop and Solenoid (3D) | See 3D magnetic field lines of a circular loop and a solenoid from the Biot–Savart law, and read B anywhere on the axis. |
| Physics | Charged Particle in E and B Fields (Helix, Cycloid) 3D | Launch electrons, protons and alpha particles into magnetic and electric fields in 3D and see circles, helices and cycloids with their radius, pitch and period. |
| Physics | Projectile Motion with Air Resistance (3D) | Compare the ideal parabola with a real 3D trajectory under air drag and side wind: range, height and time of flight. |
| Physics | Moment of Inertia About Different Axes (3D) | Spin a rod, ring, disc, sphere or plate about different 3D axes and read I, the radius of gyration and rotational kinetic energy. |
| Physics | Gyroscope Precession in 3D | See why a spinning gyroscope does not fall: torque, angular momentum and the precession rate Ω = mgr/(Iω) in 3D. |
| Physics | Young's Double Slit Experiment in 3D | Change λ, d, D and slit width and see the interference pattern, the intensity curve and the fringe width β = λD/d in 3D. |
| Physics | Lens and Mirror Ray Tracing in 3D | Trace a full 3D cone of rays through convex and concave lenses and mirrors, and read image distance, magnification and nature. |
| Physics | Polarisation and Malus's Law in 3D | Watch the electric field of light through two or three polarisers in 3D, verify Malus's law and find the Brewster angle. |
| Physics | Satellite Orbits and Escape Speed in 3D | Launch a satellite at any height and speed in 3D and see circular, elliptical and escape orbits with period, perigee and apogee. |
| Chemistry | Atomic Orbitals in 3D | See s, p and d orbitals as real 3D probability clouds, rotate them, and count radial and angular nodes. |
| Chemistry | VSEPR Molecular Shapes in 3D | Build any VSEPR shape from bond pairs and lone pairs and rotate it to see the real 3D geometry and bond angles. |
| Chemistry | Crystal Lattices and Unit Cells in 3D | Build SC, BCC, FCC and HCP unit cells in 3D, count atoms per cell, see tetrahedral and octahedral voids, and calculate density. |
| Chemistry | Ionic Crystal Structures in 3D | Rotate the rock-salt, caesium chloride, zinc blende and fluorite structures, count coordination numbers and test the radius-ratio rule. |
| Chemistry | Hybridisation in 3D (sp, sp², sp³, sp³d, sp³d²) | See sp, sp², sp³, sp³d and sp³d² hybrid orbitals in 3D with their bond angles, s character and leftover p orbitals. |
| Chemistry | Molecular Orbitals in 3D (σ, σ*, π, π*) | Watch atomic orbitals combine into bonding and antibonding molecular orbitals in 3D, then get bond order and magnetism of H₂ to Ne₂. |
| Chemistry | Chirality and R/S Configuration in 3D | Assign R and S to chiral centres by rotating real 3D models, compare a molecule with its mirror image and see why one swap inverts the configuration. |
| Chemistry | Conformations of Ethane and Butane (Newman, 3D) | Rotate around the C–C bond of ethane and butane in 3D and read the torsional energy of staggered, eclipsed, gauche and anti forms. |
| Chemistry | Geometrical Isomers of Complexes in 3D (cis/trans, fac/mer) | Rotate octahedral and square-planar complexes in 3D to tell cis from trans and fac from mer, with bond angles and polarity. |
| Chemistry | Crystal Field Splitting of d Orbitals in 3D | See which d orbitals point at the ligands in octahedral and tetrahedral complexes, then get the electron configuration, unpaired electrons, magnetic moment and CFSE. |
| Maths | Planes in 3D Geometry | Change a, b, c and d to see how a plane tilts and moves, with its normal, foot of perpendicular and distance from the origin. |
| Maths | Skew Lines and Shortest Distance in 3D | Steer a second line in 3D and see when two lines are skew, parallel or intersecting, with the shortest distance and the common perpendicular. |
| Maths | Foot and Image of a Point in a Plane (3D) | Move a point and a plane in 3D and see the distance, the foot of the perpendicular and the image of the point in the plane. |
| Maths | Dot, Cross and Box Product of Vectors in 3D | Build three vectors in 3D and see the dot product, the cross product as an area vector and the scalar triple product as a volume. |
| Maths | Conic Sections from a Cone in 3D | Slice a double cone with a plane in 3D and watch the circle, ellipse, parabola and hyperbola appear, with the eccentricity e = cos β / cos α. |
| Maths | Solids of Revolution and Volume in 3D | Revolve curves around the x- or y-axis in 3D and compute the volume with the disc and shell methods. |
| Maths | Limits of Two-Variable Functions on 3D Surfaces | Explore 3D surfaces and approach the origin along lines and parabolas to see when a limit exists and when it fails. |
Yes. They use WebGL, which all modern phone browsers support. Turn on Low power if the phone gets warm.
Yes. The page link keeps the slider values and the camera angle; use the Share tab to copy it.
