Is this good for educators?

Yes — this version of "Photovoltaic Physics for a carousel" is framed for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs.

Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Educators · Photovoltaic Physics

Photovoltaic Physics for a carousel

Built for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs. Simulate a carousel live below — adjust the inputs and watch it respond, right in your browser.

LED

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LED Band Gap & ColorLive

from energy gap to photon

590 nm

2.10 eV band gap

Controls

Presets

Band gap Eg (eV)

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

λ = \frac{h c}{E _{g}} = \frac{1240}{2.10 eV} = 590 nm

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.

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Solar Panel

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Solar PV SystemLive

panels to kilowatt-hours

Controls

Presets

Panel area (m²)

Panel efficiency (%)

Peak sun hours/day

Tilt angle (°)

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

P = η A G = 0.20 \times 20 \times 1000 = 4000 W

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

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Frequently asked questions

Is this good for educators?: Yes — this version of "Photovoltaic Physics for a carousel" is framed for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.