Photovoltaic Physics for a yo-yo
Built for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model. Simulate a yo-yo live below — adjust the inputs and watch it respond, right in your browser.
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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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Governing equation
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
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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.
Data Inspector
Governing equation
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
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Frequently asked questions
- Is this good for researchers?
- Yes — this version of "Photovoltaic Physics for a yo-yo" is framed for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.