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Photovoltaic Physics for a water rocket

Simulate a water rocket live in your browser. This runs the real Photovoltaic Physics solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:StudentsResearchersEducatorsEngineersHobbyists & MakersK-12 StudentsFirst Responders
1

LED

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LED Band Gap & ColorLive
590 nm
2.10 eV band gap

Controls

Presets

An LED emits light when electrons drop across the semiconductor's band gap, each releasing a photon of energy equal to that gap. Since photon energy fixes wavelength (λ = 1240/Eg in nm), the band gap directly sets the color — which is why blue LEDs needed a whole new material (gallium nitride) and a Nobel Prize to achieve.

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Data Inspector

Wavelength590 nm
Regionvisible
MaterialGaP/AlInGaP (green-red)

Governing equation

Reading this result: λ = 1240/Eg puts this 2.10 eV gap at 590 nm — a wider gap means a bluer photon, which is exactly why blue LEDs needed the high-gap GaN family.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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2

Solar Panel

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Solar PV SystemLive

Controls

Presets

A solar array's output is its rated power (area × efficiency at 1000 W/m²) multiplied by the peak sun hours your location receives — the equivalent full-intensity hours per day. Tilt matters too: aiming the panels near your latitude maximizes annual yield. Real systems lose a bit more to heat, wiring, and inverters.

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Data Inspector

System rating4.0 kW
Daily energy19.2 kWh
Annual energy6996 kWh
Homes powered0.7

Governing equation

Reading this result: A 4.0 kW array in 5-sun-hour sun yields about 19.2 kWh/day — roughly 0.7 average homes.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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About this simulation

The full Photovoltaic Physics tool models a water rocket with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with Photovoltaic Physics

Photovoltaic Physics for a projectile from a cannonPhotovoltaic Physics for a bouncing ballPhotovoltaic Physics for a pendulum clockPhotovoltaic Physics for a car brakingPhotovoltaic Physics for a roller-coaster loopPhotovoltaic Physics for a satellite orbitPhotovoltaic Physics for a mass on a springPhotovoltaic Physics for a skydiver's free fall

Other ways to simulate a water rocket

Particle / N-Body for a water rocketHeat & Wave Fields for a water rocketGPU Compute (WebGPU) for a water rocketWebGPU Fluid for a water rocketGPU N-Body for a water rocketGPU PDE Solver for a water rocket

Frequently asked questions

How do I simulate a water rocket?
Open this page and use the live Photovoltaic Physics tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?
Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?
Absolutely — every input is adjustable, and with data import you can drive a water rocket from your own measurements.