Physics catalogue
47 published interactive labs from the NEET syllabus. Search a topic or start with the chapter in front of you.
Dual Nature of Radiation and Matter
Every particle is also a wave. Drag a slider to watch a cricket ball's wavelength shrink to nothing, then see why an electron in an atom has no choice but to form a standing wave. Includes a NEET formula decoder and the historic 1927 Davisson-Germer experiment.
Dual Nature of Radiation and Matter
Watch a 3D electron wave wrap around a nucleus. Rotate it with your finger. At integer wavelengths the wave closes cleanly — at fractions it fails. The same standing-wave principle that explains why orbits are quantized, in 3D.
Dual Nature of Radiation and Matter
Is 3D vacuum-tube lab mein light ke photon packets metal plate par padenge, electrons emit honge aur negative collector unhe rokkar stopping potential dikhayega. Frozen stepper se threshold cross karo, intensity aur Kmax ka difference dekho, phir Einstein equation aur straight-line graph ko live controls se verify karo.
Atoms & Modern Physics
Bohr's electron rides a fixed circular orbit. Heisenberg's jumps randomly inside a 90% probability sphere. Tap Trace path and watch the truth emerge — the 1s orbital is not a path. It is the record of where the electron has been.
Atoms & Modern Physics
Drag a temperature slider from human body heat to a blue supergiant. Watch Planck's curve shift, see why classical physics predicted an ultraviolet catastrophe, and understand Wien's law and Stefan-Boltzmann in real time.
Electric Charges and Fields
Move a point charge to the centre, face, edge, and corner of a cube and watch the electric flux change from q/ε₀ to q/8ε₀ — Gauss's law you can rotate and feel, not memorize.
Electric Charges and Fields
Is 3D lab mein Gaussian surface choose karke point charge, infinite charged sheet aur spherical shell ke electric fields samajhlo. Sphere, pillbox, symmetry, enclosed charge aur field direction ko visually check karo.
Electric Charges and Fields
Do point charges ke beech electrostatic force aur electric field ko 3D mein explore karo. Source charge Q, draggable test charge q, radial field vectors, distance ruler aur force arrow ek hi spatial model mein dikhte hain. Signs badalne par attraction-repulsion samajho, separation badalne par exact inverse-square fall-off check karo, aur small positive test charge ki definition se E = F/q0 verify karo.
Electromagnetic Waves
Watch a light wave travel: the electric field (orange) and magnetic field (teal) oscillate at 90° to each other, perfectly in phase, each one regenerating the other as the wave races forward at c.
Electromagnetic Waves
Charging capacitor ka gap dekhakar samjho: dielectric mein conduction current zero hai, lekin changing electric field displacement current create karti hai. Is 3D lab mein switch, E-field, J_d, B rings aur Amperian probe ke saath Maxwell ki missing current ko visualize karo. Last stop par E aur B mutually perpendicular hokar electromagnetic wave ki speed c par travel karte hain.
Work, Energy and Power
Two spheres on a frictionless track. Drag the coefficient of restitution e from 0 to 1 and watch the same collision morph from stick-together to perfect bounce — while momentum stays conserved every single time. Exact closed-form physics, live energy bars, the COM frame, and a challenge mode where you predict the final velocities first.
Work, Energy and Power
Spring ko compress karke frictionless block launch karein aur energy transfer ko 3D me dekhein. Launch ke dauran spring force aur displacement same direction me hote hain, isliye spring block par positive work W_s = 1/2 kx^2 karta hai jabki block spring par negative work karta hai. Compression, spring constant aur block mass change karke conservation, launch speed aur peak instantaneous power compare karein.
Work, Energy and Power
Is 3D lab me potential-energy surface, uske gradient aur constrained bead ko ek saath explore karo. Orange arrows F = -∇U dikhate hain, U(x) ribbon F_x = -dU/dx batata hai, aur do routes same start-finish energy par conservative force ka path independence dikhate hain. Minimum, maximum, equilibrium, spring energy aur W = -ΔU ko frozen lesson steps me samjho.
Wave Optics
Two coherent slits, one screen, live interference fringes. Drag λ, slit separation d and screen distance D and watch the fringe pattern breathe in real time — β = λD/d born in front of you. A movable point P reads out path difference, phase, order and intensity; toggle white light or dip the setup in water (μ) to see the fringes shrink. Exact small-angle physics with a live intensity graph and challenge mode.
Wave Optics
Is 3D optical bench me random E-fields Polaroid se plane-polarised light, rotating analyser se optional enrichment wala cos²theta response, aur glass plate se Brewster reflection explore karo. Glass ko ghumao, reflected aur refracted rays ko 90° par le aao, aur analyser se reflected beam ki full extinction verify karo. Har stop model, reading aur angle presets ek hi state se control karte hain.
System of Particles and Rotational Motion
Char bodies — ring, disc, hollow sphere, solid sphere — ek hi incline pe, ek saath release. Ab tumhe mass aur radius ke sliders milte hain aur challenge ye hai ki race ka result badlo. Spoiler: nahi badlega. Kyunki rolling without slipping mein a = g·sinθ/(1+k), jahan M aur R completely cancel ho jaate hain — sirf shape factor k bachta hai. Live leaderboard, exact finish times, aur woh NEET classic 'kaun pehle pahunchega' — sab ek jagah.
System of Particles and Rotational Motion
Ek 3D rigid body chuno, uska clearly labelled CM axis dekho aur parallel axis ko distance d par shift karo. Har mass marker ka dm·r_perp² tap karke contribution dekho, phir parallel-axis theorem I = I_cm + Md² verify karo. Ring, disc, solid sphere aur rod ke reference moments bhi axis direction ke saath compare hote hain. Last stop mein glowing k-cylinder batata hai ki k = √(I/M) ek specific axis ke relative hi define hota hai.
System of Particles and Rotational Motion
Angular momentum ko sirf formula se nahi, real 3D systems mein dekho: solid sphere par spin, point masses ke saath inertia badalna, satellite ka circular orbit aur ice-skater ke arms contract karna. Har station par L = I omega, right-hand rule aur zero net external torque clear hota hai. Readouts model ke exact values se aate hain, isliye I badhne par omega girta hai, mass orbit mein mvr constant rehta hai, aur skater ke arms andar aane par L badle bina omega tez ho jaata hai.
System of Particles and Rotational Motion
Teen masses ko 3D space mein drag karke live centre of mass calculate karo, same body ko alag-alag suspension points se latkao, symmetric bodies ka geometric centre compare karo, aur open ring-arc ko knife edge par balance karo. Is lab se inverse-mass division, rigid-body symmetry, plumb-line alignment aur knife-edge condition ek hi visual model mein clear hote hain.
Ray Optics and Optical Instruments
Sabne sin C = 1/μ ratt liya, par refracted ray ko MARTE hue kisi ne nahi dekha. Is lab mein incidence angle drag karo aur dekho refracted ray surface pe kaise letti hai (r → 90°), phir ek degree baad poore gayab — 100% light wapas. Water, glass, diamond ke saath C compare karo, aur rare→dense flip karke khud dekho ki wahan TIR possible hi nahi hai. Neeche optical-fibre mini-view mein wahi ray fibre ke andar bounce hoti dikhegi jab TIR on ho.
Ray Optics and Optical Instruments
Spherical mirror ke principal rays, local normal aur image location ko 3D optical bench par explore karo. Object aur screen drag karke C, F aur P ke around image banao, live u, v, f aur m se mirror formula verify karo, aur real image ko screen par intercept karwao.
Ray Optics and Optical Instruments
Air-glass interface, parallel-sided slab aur prism refraction ko true 3D geometry mein dekho. Ray normal ke angle par bend hota hai, slab emergent ray ko parallel rakhta hai lekin side shift karta hai, aur prism mein delta = i + e - A hota hai. Minimum deviation condition ko turntable par tune karke Snell law aur prism formulas ko visually check karo.
Semiconductor Electronics
Sab kehte hain 'depletion region mein charges hain' — ulta! Yaha pe tu khud dekhega ki mobile carriers junction chhod ke jaate hain aur FIXED ions peeche rehte hain. Bias stepper ghumao: equilibrium se lekar forward knee aur reverse breakdown tak, depletion region saans leti hui dikhegi. Barrier potential ka graph 3D ke saath sync mein breathe karta hai. Si vs Ge ka knee voltage aur doping ka width pe asar — sab live.
Semiconductor Electronics
Pure silicon ki tetrahedral bonding, energy bands aur temperature effect ko true 3D lattice mein dekho. Har stop par frozen state badlega: pehle 0 K par full valence band aur empty conduction band, phir heat se electron-hole pairs, band-gap comparison aur P donor ya B acceptor doping. Atom par click karke silicon ke 4 covalent bonds aur impurity atoms ke valence-electron count bhi inspect kar sakte ho.
Semiconductor Electronics
Bridge rectifier ko sirf diagram se nahi, working 3D circuit se samajho. Half-wave se centre-tapped aur bridge topology tak jaate hue dekho ki D1-D3 ya D2-D4 kis AC polarity par conduct karte hain, load current ki direction kyun same rehti hai, aur smoothing capacitor ripple kaise kam karta hai.
Kinematics
Ground, car aur truck frame ke beech switch karke dekho ki ek hi vehicle ka measured velocity badal sakta hai. Red car aur blue truck ke signed velocities set karo, phir vector subtraction v_R,T = v_R − v_T ko 3D road aur hanging triangle mein step-by-step follow karo. Same direction mein relative speed difference hai, opposite direction mein signed components ke add hone se speed badhti hai, aur truck frame mein truck ka vector exactly zero rehta hai.
Kinematics
River–boat problem ko formula se pehle 3D vectors se samajho. Boat ka aim, still-water speed aur stream speed badlo; phir resultant velocity, shortest-time crossing, downstream drift aur zero-drift pier landing compare karo. Har vector ek hi horizontal plane mein rahega, aur v_boat/ground = v_boat/water + v_water/ground relation ko vector triangle se dekhna milega.
Kinematics
Straight 3D road par frozen time steps scrub karo aur dekho ki default u = 0, a = 2 m/s² par car 0, 1, 4 aur 9 m par kaise pahunchta hai. Teal tube travelled distance, orange arrow +x displacement aur fixed-scale yellow columns uniform speed increments dikhate hain. v–t straight line aur x–t parabola bhi same motion ko 3D me visualize karte hain.
Current Electricity
Is 3D circuit board par current ko do-loop network se guzarte hue dekho. Pehle simple loop, phir junction par I1 = I2 + I3, aur loop rule ke signed potential changes samjho. Last stop par identical cells ko series aur parallel me compare karo, internal resistance cutaway kholo, ammeter select karo aur switch se circuit open-close karo.
Current Electricity
Interactive 3D lab mein Wheatstone bridge ke P, Q, R aur S arms, galvanometer branch aur null condition ko step-by-step dekho. Phir same circuit ko practical metre bridge mein badlo: 1 m long, 100 Ω uniform wire par jockey drag karke exact balance point dhundho. Galvanometer needle, detector lamp aur current arrows se samajho ki null par G-branch current zero hota hai, jabki cell-fed arms ka current zero nahi hota.
Current Electricity
Is 3D lab me ek solid copper conductor ke positive ion lattice aur delocalized electrons ko 3D me dekho. Battery connect karne par electric field, conventional current aur opposite electron drift ka direction samjho; voltmeter probes se selected span ka resistance measure karo; phir length, cross-section aur temperature badal kar R = rho L/A explore karo. Electron sample schematic hai, lekin current, potential difference aur resistivity ke exact values live calculate hote hain.
Thermal Properties of Matter
20.00 mm brass ball aur 20.02 mm iron hole ke beech sirf 0.02 mm clearance hai. Is 3D lab mein dono solids ko 20 °C se 200 °C tak heat karke live diameters compare karo, clear section view mein hole ke andar se expansion dekho, aur cooling par reversible change observe karo.
Thermal Properties of Matter
Copper rod aur paani ke beech heat ka asli 3D transfer dekho. Pehle 20 °C par equilibrium, phir copper mein yellow arrows ke through conduction aur paani ke orange circulation arrows se convection. Copper atoms fixed lattice sites par vibrate karte hain, material bulk mein travel nahi karta, aur burner band karne ke baad stored-energy gradients dheere kam hote hain.
Waves
Organ pipe ki resonance ko sirf formula se nahi, actual 3D air column se samajho. Open-open, closed-open aur closed-closed columns ko rotate karke displacement nodes, antinodes aur pressure pattern compare karo. Open column 1:2:3:4 deta hai, one-end-closed column sirf 1:3:5 deta hai, aur closed-closed column bhi 1:2:3:4 deta hai. Mode selector se nodes compare karo, fork frequency match karo aur fundamental ko overtone se alag karke exam-ready concept pakdo.
Waves
Ek 3D string par equal-frequency opposite travelling waves ko superpose karke standing wave explore karo. Nodes, antinodes, normal modes aur antinode amplitude 2A ko visually check karo. Phir 220 Hz aur 224 Hz drivers ko detune karke 4 beats s^-1 ke beat pattern ko count karo. Controls se f1, f2, A, T, mu aur L badal sakte ho, driver beads ko drag karke coupling check kar sakte ho, aur slow motion ya time-step se wave evolution freeze karke samajh sakte ho.