Do I need to install anything?

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

For Hobbyists & Makers · Spectroscopy Kit

Spectroscopy Kit for a slingshot

Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate a slingshot live below — adjust the inputs and watch it respond, right in your browser.

Blackbody

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Blackbody RadiationLive

Planck's law · Wien's displacement

Controls

Every warm object glows with a Planck spectrum. Heat it up and the peak shifts to shorter (bluer) wavelengths — that's why stars range from red to blue-white.

Presets

Temperature (K)

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Data Inspector

Temperature5778 K

Peak wavelength502 nm

Colorwhite/yellow

Governing equation

λ_{m a x} = \frac{b}{T} = \frac{2.898 \times 1 0 ^{6}}{5778} = 502 nm

Reading this result: At 5778 K the Planck curve peaks at 502 nm, inside the visible band — Wien's law makes peak wavelength ∝ 1/T, so doubling the temperature halves the peak wavelength and shifts the glow toward blue.

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

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Hydrogen Orbitals

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Hydrogen OrbitalsLive

electron probability clouds

Controls

Solving the Schrödinger equation for hydrogen gives the orbitals — the probability clouds where an electron is likely to be found. The quantum numbers n, l, and m set the size, shape, and orientation. Brighter regions are higher probability density.

Presets

Principal n

Azimuthal l

Magnetic m

▶ Run in Python

Data Inspector

Orbital2p_z

Quantum numbersn=2, l=1, m=0

Energy-3.40 eV

Nodes0 radial, 1 angular

Governing equation

E_{2} = - \frac{13.6}{2 ^{2}} eV = - 3.40 eV (2 p)

Reading this result: n=2 sets the shell and energy (E = -3.40 eV) and the overall size of the cloud. l=1 sets the shape: two lobes (p). m=0 sets the orientation in space. This orbital has 0 radial nodes and 1 angular node.

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

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More with Spectroscopy Kit

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Frequently asked questions

Is this good for hobbyists & makers?: Yes — this version of "Spectroscopy Kit for a slingshot" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.