firstRadiation

First radiation constant

Try it yourself:


First Radiation Constant

firstRadiation is a radiation constant used in Planck-law and blackbody spectral formulas.

Thermal radiation

Use it with secondRadiation, planckConstant, and boltzmann. Wavelength, frequency, and temperature units must match the chosen Planck-law form.

Use First Radiation in a calculation

Enter firstRadiation on a calculator line to see its built-in value, or place the name inside a longer expression. Keep any displayed unit attached when converting or combining physical quantities, and check that every other value uses a compatible dimension.

The example above is editable, so you can replace surrounding values and test the constant in your own formula. Browse all constants to compare related values and notation.

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