Calculadora de Longitud de Onda Pico de Cuerpo Negro
Calcula la longitud de onda del pico de emisión de un cuerpo negro usando la ley de desplazamiento de Wien. Ingresa la temperatura en kelvin.
Longitud de Onda Pico
0.000000501558 m
Peak Wavelength vs Temperature
Fórmula
Wien's Displacement Law
The wavelength at which a blackbody emits most intensely is inversely proportional to its temperature.
Formula
lambda_max = b / T
Hotter objects peak at shorter (bluer) wavelengths; cooler objects peak at longer (redder) wavelengths.
Ejemplo Resuelto
The Sun's surface at 5778 K.
- 01lambda_max = b / T
- 02lambda_max = 2.898e-3 / 5778
- 03lambda_max = 5.015e-7 m = 501.5 nm
- 04This falls in the green part of the visible spectrum.
Preguntas Frecuentes
Why does the Sun appear yellow-white if it peaks in green?
The Sun emits across the entire visible spectrum. Our eyes perceive the broad combination as white or slightly yellow, not green.
What does a room-temperature object emit?
At 300 K, the peak is at about 9.66 micrometres, in the mid-infrared. This is why thermal cameras work in the infrared.
Is this law exact?
Wien's law gives the peak of the Planck spectrum as a function of wavelength. The peak in frequency differs slightly because the Planck function has different shapes in wavelength vs. frequency space.
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